US20090192183A1 - Oxymorphone Controlled Release Formulations - Google Patents
Oxymorphone Controlled Release Formulations Download PDFInfo
- Publication number
- US20090192183A1 US20090192183A1 US12/426,112 US42611209A US2009192183A1 US 20090192183 A1 US20090192183 A1 US 20090192183A1 US 42611209 A US42611209 A US 42611209A US 2009192183 A1 US2009192183 A1 US 2009192183A1
- Authority
- US
- United States
- Prior art keywords
- oxymorphone
- hours
- blood plasma
- administration
- plasma concentration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
- A61K31/47—Quinolines; Isoquinolines
- A61K31/485—Morphinan derivatives, e.g. morphine, codeine
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/02—Inorganic compounds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
- A61K47/08—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite containing oxygen, e.g. ethers, acetals, ketones, quinones, aldehydes, peroxides
- A61K47/10—Alcohols; Phenols; Salts thereof, e.g. glycerol; Polyethylene glycols [PEG]; Poloxamers; PEG/POE alkyl ethers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
- A61K47/26—Carbohydrates, e.g. sugar alcohols, amino sugars, nucleic acids, mono-, di- or oligo-saccharides; Derivatives thereof, e.g. polysorbates, sorbitan fatty acid esters or glycyrrhizin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
- A61K47/36—Polysaccharides; Derivatives thereof, e.g. gums, starch, alginate, dextrin, hyaluronic acid, chitosan, inulin, agar or pectin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/30—Macromolecular organic or inorganic compounds, e.g. inorganic polyphosphates
- A61K47/36—Polysaccharides; Derivatives thereof, e.g. gums, starch, alginate, dextrin, hyaluronic acid, chitosan, inulin, agar or pectin
- A61K47/38—Cellulose; Derivatives thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/0012—Galenical forms characterised by the site of application
- A61K9/0053—Mouth and digestive tract, i.e. intraoral and peroral administration
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/20—Pills, tablets, discs, rods
- A61K9/2004—Excipients; Inactive ingredients
- A61K9/2009—Inorganic compounds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/20—Pills, tablets, discs, rods
- A61K9/2004—Excipients; Inactive ingredients
- A61K9/2013—Organic compounds, e.g. phospholipids, fats
- A61K9/2018—Sugars, or sugar alcohols, e.g. lactose, mannitol; Derivatives thereof, e.g. polysorbates
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/20—Pills, tablets, discs, rods
- A61K9/2004—Excipients; Inactive ingredients
- A61K9/2022—Organic macromolecular compounds
- A61K9/205—Polysaccharides, e.g. alginate, gums; Cyclodextrin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/20—Pills, tablets, discs, rods
- A61K9/2004—Excipients; Inactive ingredients
- A61K9/2022—Organic macromolecular compounds
- A61K9/205—Polysaccharides, e.g. alginate, gums; Cyclodextrin
- A61K9/2054—Cellulose; Cellulose derivatives, e.g. hydroxypropyl methylcellulose
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/20—Pills, tablets, discs, rods
- A61K9/2072—Pills, tablets, discs, rods characterised by shape, structure or size; Tablets with holes, special break lines or identification marks; Partially coated tablets; Disintegrating flat shaped forms
- A61K9/2086—Layered tablets, e.g. bilayer tablets; Tablets of the type inert core-active coat
- A61K9/209—Layered tablets, e.g. bilayer tablets; Tablets of the type inert core-active coat containing drug in at least two layers or in the core and in at least one outer layer
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P25/00—Drugs for disorders of the nervous system
- A61P25/04—Centrally acting analgesics, e.g. opioids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
Definitions
- the clinical usefulness of the analgesic properties of opioids has been recognized for centuries, and morphine and its derivatives have been widely employed for analgesia for decades in a variety of clinical pain states.
- Oxymorphone HCl (14-hydroxydihydromorphinone hydrochloride) is a semi-synthetic phenanthrene-derivative opioid agonist, widely used in the treatment of acute and chronic pain, with analgesic efficacy comparable to other opioid analgesics.
- Oxymorphone is currently marketed as an injection (1 mg/ml in 1 ml ampules; 1.5 mg/ml in 1 ml ampules; 1.5 mg/ml in 10 ml multiple dose vials) for intramuscular, subcutaneous, and intravenous administration, and as 5 mg rectal suppositories.
- 2 mg, 5 mg and 10 mg oral immediate release (IR) tablet formulations of oxymorphone HCl were marketed.
- Oxymorphone HCl is metabolized principally in the liver and undergoes conjugation with glucuronic acid and reduction to 6-alpha- and beta-hydroxy epimers.
- An important goal of analgesic therapy is to achieve continuous relief of chronic pain.
- Regular administration of an analgesic is generally required to ensure that the next dose is given before the effects of the previous dose have worn off.
- Compliance with opioids increases as the required dosing frequency decreases.
- Non-compliance results in suboptimal pain control and poor quality of life outcomes.
- Painrrell B et al Effects of controlled-release morphine on quality of life for cancer pain. Oncol. Nur. Forum 1989; 4:521-26).
- Scheduled, rather than “as needed” administration of opioids is currently recommended in guidelines for their use in chronic non-malignant pain.
- a controlled release formulation of morphine has been demonstrated to provide patients fewer interruptions in sleep, reduced dependence on caregivers, improved compliance, enhanced quality of life outcomes, and increased control over the management of pain.
- the controlled release formulation of morphine was reported to provide more constant plasma concentration and clinical effects, less frequent peak to trough fluctuations, reduced dosing frequency, and possibly fewer side effects.
- Oxymorphone is metabolized principally in the liver, resulting in an oral bioavailability of about 10%.
- Evidence from clinical experience suggests that the short duration of action of immediate release oxymorphone necessitates a four hour dosing schedule to maintain optimal levels of analgesia. It would be useful to clinicians and patients alike to have controlled release dosage forms of oxymorphone to use to treat pain and a method of treating pain using the dosage forms.
- the present invention provides methods for relieving pain by administering a controlled release pharmaceutical tablet containing oxymorphone which produces at least a predetermined minimum blood plasma level for at least 12 hours after dosing, as well as tablets that produce the sustained pain relief over this time period.
- FIG. 1 is a pharmacokinetic profile for 6-hydroxy oxymorphone with PID scores.
- FIG. 2 is a pharmacokinetic profile for oxymorphone with PID scores.
- FIG. 3 is a pharmacokinetic profile for 6-hydroxy oxymorphone with categorical pain scores.
- FIG. 4 is a pharmacokinetic profile for oxymorphone with categorical pain scores.
- FIG. 5 is a graph of the mean blood plasma concentration of oxymorphone versus time for clinical study 1.
- FIG. 6 is a graph of the mean blood plasma concentration of oxymorphone versus time for clinical study 2.
- FIG. 7 is a graph of the mean blood plasma concentration of oxymorphone versus time for clinical study 3.
- FIG. 8 is a graph of the mean blood plasma concentration of 6-hydroxy oxymorphone versus time for clinical study 3.
- FIG. 9 is a graph of the mean blood plasma concentration of oxymorphone for immediate and controlled release tablets from a single dose study.
- FIG. 10 is a graph of the mean blood plasma concentration of oxymorphone for immediate and controlled release tablets from a steady state study.
- the present invention provides methods for alleviating pain for 12 to 24 hours using a single dose of a pharmaceutical composition by producing a blood plasma level of oxymorphone and/or 6-OH oxymorphone of at least a minimum value for at least 12 hours or more.
- 6-OH oxymorphone and “6-hydroxy oxymorphone” are interchangeable and refer to the analog of oxymorphone having an alcohol (hydroxy) moiety that replaces the carboxy moiety found on oxymorphone at the 6-position.
- this invention provides an oxymorphone controlled release oral solid dosage form, comprising a therapeutically effective amount of oxymorphone or a pharmaceutically acceptable salt of oxymorphone. It has been found that the decreased rate of release of oxymorphone from the oral controlled release formulation of this invention does not substantially decrease the bioavailability of the drug as compared to the same dose of a solution of oxymorphone administered orally.
- the bioavailability is sufficiently high and the release rate is such that a sufficient plasma level of oxymorphone and/or 6-OH oxymorphone is maintained to allow the controlled release dosage to be used to treat patients suffering moderate to severe pain with once or twice daily dosing.
- the dosing form of the present invention can also be used with thrice daily dosing.
- an immediate release formulation releases at least 80% of its active pharmaceutical ingredient within 30 minutes.
- the definition of an immediate release formulation will be broadened further to include a formulation which releases more than about 80% of its active pharmaceutical ingredient within 60 minutes in a standard USP Paddle Method dissolution test at 50 rpm in 500 ml media having a pH of between 1.2 and 6.8 at 37° C.
- Controlled release” formulations as referred to herein, will then encompass any formulations which release no more than about 80% of their active pharmaceutical ingredients within 60 minutes under the same conditions.
- the controlled release dosage form of this invention exhibits a dissolution rate in vitro, when measured by USP Paddle Method at 50 rpm in 500 ml media having a pH between 1.2 and 6.8 at 37° C., of about 15% to about 50% by weight oxymorphone released after 1 hour, about 45% to about 80% by weight oxymorphone released after 4 hours, and at least about 80% by weight oxymorphone released after 10 hours.
- an effective controlled release dosage form of oxymorphone When administered orally to humans, an effective controlled release dosage form of oxymorphone should exhibit the following in vivo characteristics: (a) peak plasma level of oxymorphone occurs within about 1 to about 8 hours after administration; (b) peak plasma level of 6-OH oxymorphone occurs within about 1 to about 8 hours after administration; (c) duration of analgesic effect is through about 8 to about 24 hours after administration; (d) relative oxymorphone bioavailability is in the range of about 0.5 to about 1.5 compared to an orally-administered aqueous solution of oxymorphone; and (e) the ratio of the area under the curve of blood plasma level vs. time for 6-OH oxymorphone compared to oxymorphone is in the range of about 0.5 to about 1.5.
- the parameters set forth above are intended to be mean values from a sufficiently large study so as to minimize the effect of individual variation in arriving at the values.
- a convenient method for arriving at such values is by conducting a study in accordance with standard FDA procedures such as those employed in producing results for use in a new drug application (or abbreviated new drug application) before the FDA.
- Any reference to mean values herein, in conjunction with desired results, refer to results from such a study, or some comparable study. Reference to mean values reported herein for studies actually conducted are arrived at using standard statistical methods as would be employed by one skilled in the art of pharmaceutical formulation and testing for regulatory approval.
- the oxymorphone or salt of oxymorphone is dispersed in a controlled release delivery system that comprises a hydrophilic material which, upon exposure to gastrointestinal fluid, forms a gel matrix that releases oxymorphone at a controlled rate.
- the rate of release of oxymorphone from the matrix depends on the drug's partition coefficient between components of the matrix and the aqueous phase within the gastrointestinal tract.
- the hydrophilic material of the controlled release delivery system comprises a mixture of a heteropolysaccharide gum and an agent capable of cross-linking the heteropolysaccharide in presence of gastrointestinal fluid.
- the controlled release delivery system may also comprise a water-soluble pharmaceutical diluent mixed with the hydrophilic material.
- the cross-linking agent is a homopolysaccharide gum and the inert pharmaceutical diluent is a monosaccharide, a disaccharide, or a polyhydric alcohol, or a mixture thereof.
- the appropriate blood plasma levels of oxymorphone and 6-hydroxy oxymorphone are achieved using oxymorphone in the form of oxymorphone hydrochloride, wherein the weight ratio of heteropolysaccharide to homopolysaccharide is in the range of about 1:3 to about 3:1, the weight ratio of heteropolysaccharide to diluent is in the range of about 1:8 to about 8:1, and the weight ratio of heteropolysaccharide to oxymorphone hydrochloride is in the range of about 10:1 to about 1:10.
- a preferred heteropolysaccharide is xanthan gum and a preferred homopolysaccharide is locust bean gum.
- the dosage form also comprises a cationic cross-linking agent and a hydrophobic polymer.
- the dosage form is a tablet containing about 5 mg to about 80 mg of oxymorphone hydrochloride. In a most preferred embodiment, the tablet contains about 20 mg oxymorphone hydrochloride.
- the invention includes a method which comprises achieving appropriate blood plasma levels of drug while providing extended pain relief by administering one to three times per day to a patient suffering moderate to severe, acute or chronic pain, an oxymorphone controlled release oral solid dosage form of the invention in an amount sufficient to alleviate the pain for a period of about 8 hours to about 24 hours.
- This type and intensity of pain is often associated with cancer, autoimmune diseases, infections, surgical and accidental traumas and osteoarthritis.
- the invention also includes a method of making an oxymorphone controlled release oral solid dosage form of the invention which comprises mixing particles of oxymorphone or a pharmaceutically acceptable salt of oxymorphone with granules comprising the controlled release delivery system, preferably followed by directly compressing the mixture to form tablets.
- salts of oxymorphone which can be used in this invention include salts with the inorganic and organic acids which are commonly used to produce nontoxic salts of medicinal agents. Illustrative examples would be those salts formed by mixing oxymorphone with hydrochloric, sulfuric, nitric, phosphoric, phosphorous, hydrobromic, maleric, malic, ascorbic, citric or tartaric, pamoic, lauric, stearic, palmitic, oleic, myristic, lauryl sulfuric, naphthylenesulfonic, linoleic or linolenic acid, and the like.
- the hydrochloride salt is preferred.
- 6-OH oxymorphone which is one of the metabolites of oxymorphone, may play a role in alleviating pain.
- part of the dosage gets into the bloodstream to provide pain relief, while another part is metabolized to 6-OH oxymorphone.
- This metabolite then enters the bloodstream to provide further pain relief.
- both the oxymorphone and 6-hydroxyoxymorphone levels are important to pain relief.
- FIGS. 1-2 show the results of these tests, comparing pain levels to oxymorphone and 6-hydroxy oxymorphone levels.
- VAS Visual Analog Scale
- Categorical Scale a Visual Analog Scale
- the VAS scales consisted of a horizontal line, 100 mm in length. The left-hand end of the scale (0 mm) was marked with the descriptor “No Pain” and the right-hand end of the scale (100 mm) was marked with the descriptor “Extreme Pain”. Patients indicated their level of pain by making a vertical mark on the line. The VAS score was equal to the distance (in mm) from the left-hand end of the scale to the patient's mark.
- the oxymorphone controlled release oral solid dosage form of this invention can be made using any of several different techniques for producing controlled release oral solid dosage forms of opioid analgesics.
- a core comprising oxymorphone or oxymorphone salt is coated with a controlled release film which comprises a water insoluble material and which upon exposure to gastrointestinal fluid releases oxymorphone from the core at a controlled rate.
- the oxymorphone or oxymorphone salt is dispersed in a controlled release delivery system that comprises a hydrophilic material which upon exposure to gastrointestinal fluid forms a gel matrix that releases oxymorphone at a controlled rate.
- a third embodiment is a combination of the first two: a controlled release matrix coated with a controlled release film.
- the oxymorphone is incorporated into an osmotic pump.
- the dosage form can be a tablet, a plurality of granules in a capsule, or other suitable form, and can contain lubricants, colorants, diluents, and other conventional ingredients.
- An osmotic pump comprises a shell defining an interior compartment and having an outlet passing through the shell.
- the interior compartment contains the active pharmaceutical ingredient.
- the active pharmaceutical ingredient is mixed with excipients or other compositions such as a polyalkylene.
- the shell is generally made, at least in part, from a material (such as cellulose acetate) permeable to the liquid of the environment where the pump will be used, usually stomach acid.
- a core comprising oxymorphone or oxymorphone salt is coated with a controlled release film which comprises a water insoluble material.
- the film can be applied by spraying an aqueous dispersion of the water insoluble material onto the core.
- Suitable water insoluble materials include alkyl celluloses, acrylic polymers, waxes (alone or in admixture with fatty alcohols), shellac and zein.
- the aqueous dispersions of alkyl celluloses and acrylic polymers preferably contain a plasticizer such as triethyl citrate, dibutyl phthalate, propylene glycol, and polyethylene glycol.
- the film coat can contain a water-soluble material such as polyvinylpyrrolidone (PVP) or hydroxypropylmethylcellulose (HPMC).
- PVP polyvinylpyrrolidone
- HPMC hydroxypropylmethylcellulose
- the core can be a granule made, for example, by wet granulation of mixed powders of oxymorphone or oxymorphone salt and a binding agent such as HPMC, or by coating an inert bead with oxymorphone or oxymorphone salt and a binding agent such as HPMC, or by spheronising mixed powders of oxymorphone or oxymorphone salt and a spheronising agent such as microcrystalline cellulose.
- the core can be a tablet made by compressing such granules or by compressing a powder comprising oxymorphone or oxymorphone salt.
- the in vitro and in vivo release characteristics of this controlled release dosage form can be modified by using mixtures of different water insoluble and water soluble materials, using different plasticizers, varying the thickness of the controlled release film, including release-modifying agents in the coating, or by providing passageways through the coating.
- the preferred composition for achieving and maintaining the proper blood plasma levels is a controlled-release matrix.
- the oxymorphone or oxymorphone salt is dispersed in a controlled release delivery system that comprises a hydrophilic material (gelling agent) which upon exposure to gastrointestinal fluid forms a gel matrix that releases oxymorphone at a controlled rate.
- hydrophilic materials include gums, cellulose ethers, acrylic resins, and protein-derived materials.
- Suitable cellulose ethers include hydroxyalkyl celluloses and carboxyalkyl celluloses, especially hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPC), HPMC, and carboxy methylcellulose (CMC).
- Suitable acrylic resins include polymers and copolymers of acrylic acid, methacrylic acid, methyl acrylate and methyl methacrylate.
- Suitable gums include heteropolysaccharide and homopolysaccharide gums, e.g., xanthan, tragacanth, acacia, karaya, alginates, agar, guar, hydroxypropyl guar, carrageenan, and locust bean gums.
- the controlled release tablet of the present invention is formed from (I) a hydrophilic material comprising (a) a heteropolysaccharide; or (b) a heteropolysaccharide and a cross-linking agent capable of cross-linking said heteropolysaccharide; or (c) a mixture of (a), (b) and a polysaccharide gum; and (II) an inert pharmaceutical filler comprising up to about 80% by weight of the tablet; and (III) oxymorphone.
- a hydrophilic material comprising (a) a heteropolysaccharide; or (b) a heteropolysaccharide and a cross-linking agent capable of cross-linking said heteropolysaccharide; or (c) a mixture of (a), (b) and a polysaccharide gum; and (II) an inert pharmaceutical filler comprising up to about 80% by weight of the tablet; and (III) oxymorphone.
- heteropolysaccharide as used herein is defined as a water-soluble polysaccharide containing two or more kinds of sugar units, the heteropolysaccharide having a branched or helical configuration, and having excellent water-wicking properties and immense thickening properties.
- a preferred heteropolysaccharide is xanthan gum, which is a high molecular weight (>10 6 ) heteropolysaccharide.
- Other preferred heteropolysaccharides include derivatives of xanthan gum, such as deacylated xanthan gum, the carboxymethyl ether, and the propylene glycol ester.
- the cross linking agents used in the controlled release embodiment of the present invention which are capable of cross-linking with the heteropolysaccharide include homopolysaccharide gums such as the galactomannans, i.e., polysaccharides which are composed solely of mannose and galactose.
- Galactomannans which have higher proportions of unsubstituted mannose regions have been found to achieve more interaction with the heteropolysaccharide.
- Locust bean gum which has a higher ratio of mannose to the galactose, is especially preferred as compared to other galactomannans such as guar and hydroxypropyl guar.
- the ratio of heteropolysaccharide to homopolysaccharide is in the range of about 1:9 to about 9:1, preferably about 1:3 to about 3:1.
- the ratio of xanthan gum to polysaccharide material is preferably about 1:1.
- the controlled release delivery system can also contain an inert pharmaceutical diluent such as a monosaccharide, a disaccharide, a polyhydric alcohol and mixtures thereof.
- an inert pharmaceutical diluent such as a monosaccharide, a disaccharide, a polyhydric alcohol and mixtures thereof.
- the ratio of diluent to hydrophilic matrix-forming material is generally in the range of about 1:3 to about 3:1.
- the controlled release properties of the controlled release embodiment of the present invention may be optimized when the ratio of heteropolysaccharide gum to homopolysaccharide material is about 1:1, although heteropolysaccharide gum in an amount of from about 20 to about 80% or more by weight of the heterodisperse polysaccharide material provides an acceptable slow release product.
- the combination of any homopolysaccharide gums known to produce a synergistic effect when exposed to aqueous solutions may be used in accordance with the present invention. It is also possible that the type of synergism which is present with regard to the gum combination of the present invention could also occur between two homogeneous or two heteropolysaccharides.
- xanthan gum with locust bean gum with or without the other homopolysaccharide gums is an especially preferred gelling agent.
- the chemistry of certain of the ingredients comprising the excipients of the present invention such as xanthan gum is such that the excipients are considered to be self-buffering agents which are substantially insensitive to the solubility of the medicament and likewise insensitive to the pH changes along the length of the gastrointestinal tract.
- the inert filler of the sustained release excipient preferably comprises a pharmaceutically acceptable saccharide, including a monosaccharide, a disaccharide, or a polyhydric alcohol, and/or mixtures of any of the foregoing.
- suitable inert pharmaceutical fillers include sucrose, dextrose, lactose, microcrystalline cellulose, fructose, xylitol, sorbitol, mixtures thereof and the like.
- a soluble pharmaceutical filler such as lactose, dextrose, sucrose, or mixtures thereof be used.
- the cationic cross-linking agent which is optionally used in conjunction with the controlled release embodiment of the present invention may be monovalent or multivalent metal cations.
- the preferred salts are the inorganic salts, including various alkali metal and/or alkaline earth metal sulfates, chlorides, borates, bromides, citrates, acetates, lactates, etc.
- Suitable cationic cross-linking agents include calcium sulfate, sodium chloride, potassium sulfate, sodium carbonate, lithium chloride, tripotassium phosphate, sodium borate, potassium bromide, potassium fluoride, sodium bicarbonate, calcium chloride, magnesium chloride, sodium citrate, sodium acetate, calcium lactate, magnesium sulfate and sodium fluoride. Multivalent metal cations may also be utilized.
- the preferred cationic cross-linking agents are bivalent. Particularly preferred salts are calcium sulfate and sodium chloride.
- the cationic cross-linking agents of the present invention are added in an amount effective to obtain a desirable increased gel strength due to the cross-linking of the gelling agent (e.g., the heteropolysaccharide and homopolysaccharide gums).
- the cationic cross-linking agent is included in the sustained release excipient of the present invention in an amount from about 1 to about 20% by weight of the sustained release excipient, and in an amount about 0.5% to about 16% by weight of the final dosage form.
- the sustained release excipient comprises from about 10 to about 99% by weight of a gelling agent comprising a heteropolysaccharide gum and a homopolysaccharide gum, from about 1 to about 20% by weight of a cationic crosslinking agent, and from about 0 to about 89% by weight of an inert pharmaceutical diluent.
- the sustained release excipient comprises from about 10 to about 75% gelling agent, from about 2 to about 15% cationic crosslinking agent, and from about 30 to about 75% inert diluent.
- the sustained release excipient comprises from about 30 to about 75% gelling agent, from about 5 to about 10% cationic cross-linking agent, and from about 15 to about 65% inert diluent.
- sustained release excipient used in this embodiment of the present invention may be further modified by incorporation of a hydrophobic material which slows the hydration of the gums without disrupting the hydrophilic matrix. This is accomplished in preferred embodiments of the present invention by granulating the sustained release excipient with the solution or dispersion of a hydrophobic material prior to the incorporation of the medicament.
- the hydrophobic polymer may be selected from an alkylcellulose such as ethylcellulose, other hydrophobic cellulosic materials, polymers or copolymers derived from acrylic or methacrylic acid esters, copolymers of acrylic and methacrylic acid esters, zein, waxes, shellac, hydrogenated vegetable oils, and any other pharmaceutically acceptable hydrophobic material known to those skilled in the art.
- the amount of hydrophobic material incorporated into the sustained release excipient is that which is effective to slow the hydration of the gums without disrupting the hydrophilic matrix formed upon exposure to an environmental fluid.
- the hydrophobic material is included in the sustained release excipient in an amount from about 1 to about 20% by weight.
- the solvent for the hydrophobic material may be an aqueous or organic solvent, or mixtures thereof.
- alkylcelluloses examples include Aquacoat coating (aqueous dispersion of ethylcellulose available from FMC of Philadelphia, Pa.) and Surelease coating (aqueous dispersion of ethylcellulose available from Colorcon of West Point, Pa.).
- acrylic polymers suitable for use as the hydrophobic material include Eudragit RS and RL polymers (copolymers of acrylic and methacrylic acid esters having a low content (e.g., 1:20 or 1:40) of quaternary ammonium compounds available from Rohm America of Piscataway, N.J.).
- the controlled release matrix useful in the present invention may also contain a cationic cross-linking agent such as calcium sulfate in an amount sufficient to cross-link the gelling agent and increase the gel strength, and an inert hydrophobic material such as ethyl cellulose in an amount sufficient to slow the hydration of the hydrophilic material without disrupting it.
- a cationic cross-linking agent such as calcium sulfate in an amount sufficient to cross-link the gelling agent and increase the gel strength
- an inert hydrophobic material such as ethyl cellulose in an amount sufficient to slow the hydration of the hydrophilic material without disrupting it.
- the controlled release delivery system is prepared as a pre-manufactured granulation.
- Two controlled release delivery systems are prepared by dry blending xanthan gum, locust bean gum, calcium sulfate dehydrate, and dextrose in a high speed mixed/granulator for 3 minutes.
- a slurry is prepared by mixing ethyl cellulose with alcohol. While running choppers/impellers, the slurry is added to the dry blended mixture, and granulated for another 3 minutes. The granulation is then dried to a LOD (loss on drying) of less than about 10% by weight. The granulation is then milled using 20 mesh screen.
- LOD loss on drying
- Example 3 Ingredients Slow (mg) Fast (mg) Fast (mg) Oxymorphone HCl, USP 20 20 20 20 20 20 Controlled Release Delivery System 360 160 160 Silicified Microcrystalline Cellulose, 20 20 20 NF Sodium stearyl fumarate, NF 4 2 2 Total weight 404 202 202 Coating (color or clear) 12 12 9
- Study 1 addressed the relative rates of absorption of controlled release (CR) oxymorphone tablets (of Examples 2 and 3) and oral oxymorphone solution in fasted patients.
- Study 2 addressed the relative rates of absorption of CR oxymorphone tablets (of Examples 2 and 3) and oral oxymorphone solution in fed patients.
- Study 3 addressed the relative rates of absorption of CR oxymorphone tablets (of Example 4) and oral oxymorphone solution in fed and fasted patients.
- the blood plasma levels set forth herein as appropriate to achieve the objects of the present invention are mean blood plasma levels.
- the mean minimum concentration should meet the limitation set forth.
- a study should be performed with a minimum of 8 adult subjects, in a manner acceptable for filing an application for drug approval with the US Food and Drug Administration. In cases where large fluctuations are found among patients, further testing may be necessary to accurately determine mean values.
- the subjects were not to consume any alcohol-, caffeine-, or xanthine-containing foods or beverages for 24 hours prior to receiving study medication for each study period. Subjects were to be nicotine and tobacco free for at least 6 months prior to enrolling in the study. In addition, over-the-counter medications were prohibited 7 days prior to dosing and during the study. Prescription medications were not allowed 14 days prior to dosing and during the study.
- AUC (0-t) Area under the drug concentration-time curve from time zero to the time of the last quantifiable concentration (Ct), calculated using linear trapezoidal summation.
- AUC (0-inf) Area under the drug concentration-time curve from time zero to infinity.
- AUC (0-inf) AUC (0-t) +Ct/K el , where K el is the terminal elimination rate constant.
- K el Elimination rate constant based on the linear regression of the terminal linear portion of the LN(concentration) time curve.
- Terminal elimination rate constants for use in the above calculations were in turn computed using linear regression of a minimum of three time points, at least two of which were consecutive. K el values for which correlation coefficients were less than or equal to 0.8 were not reported in the pharmacokinetic parameter tables or included in the statistical analysis. Thus AUC (0-inf) was also not reported in these cases.
- a parametric (normal-theory) general linear model was applied to each of the above parameters (excluding T max ), and the LN-transformed parameters C max , AUC (0-24) , AUC (0-t) , and AUC (0-inf) .
- the analysis of variance (ANOVA) model included the following factors: treatment, sequence, subject within sequence, period, and carryover effect. If carryover effect was not significant, it was dropped from the model. The sequence effect was tested using the subject within sequence mean square, and all other main effects were tested using the residual error (error mean square).
- Plasma oxymorphone concentrations were listed by subject at each collection time and summarized using descriptive statistics. Pharmacokinetic parameters were also listed by subject and summarized using descriptive statistics.
- IR immediate release
- This study had a single-center, open-label, randomized, three-way crossover design using fifteen subjects. Subjects were in a fasted state following a 10-hour overnight fast. There was a 14-day washout interval between the three dose administrations. The subjects were confined to the clinic during each study period. Subjects receiving Treatment 1C were confined for 18 hours and subjects receiving Treatments 1A or 1B were confined for 48 hours after dosing.
- Ten-milliliter blood samples were collected during each study period at the 0 hour (predose), and at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 18, 20, 24, 28, 32, 36, and 48 hours postdose for subjects receiving Treatment 1A or 1B and 0, 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.5, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, and 18 hours post-dose.
- the mean plasma concentration of oxymorphone versus time for each treatment across all subjects is shown in table 5.
- the results are shown graphically in FIG. 5 .
- the results are normalized to a 20 mg dosage.
- the immediate release liquid of Treatment 1C shows a classical curve, with a high and relatively narrow peak, followed by an exponential drop in plasma concentration.
- the controlled release oxymorphone tablets exhibit triple peaks in blood plasma concentration. The first peak occurs (on average) at around 3 hours. The second peak of the mean blood plasma concentration is higher than the first, occurring around 6-7 hours, on average).
- the first peak is higher than the second, although generally this is not the case.
- T max time to maximum blood plasma concentration
- C max maximum blood plasma concentration
- IR immediate release
- This study had a single-center, open-label, randomized, three-way crossover design using fifteen subjects.
- the subjects were in a fed state, after a 10-hour overnight fast followed by a standardized FDA high-fat breakfast. There was a 14-day washout interval between the three dose administrations.
- the subjects were confined to the clinic during each study period. Subjects receiving Treatment 2C were confined for 18 hours and subjects receiving Treatments 2A or 2B were confined for 48 hours after dosing.
- Ten-milliliter blood samples were collected during each study period at the 0 hour (predose), and at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 18, 20, 24, 28, 32, 36, and 48 hours postdose for subjects receiving Treatment 2A or 2B and 0, 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.5, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, and 18 hours postdose.
- the mean plasma concentration of oxymorphone versus time for each treatment across all subjects is shown in table 9.
- the results are shown graphically in FIG. 6 . Again, the results have been normalized to a 20 mg dosage.
- the immediate release liquid of Treatment 2C shows a classical curve, with a high and relatively narrow peak, followed by an exponential drop in plasma concentration, while the controlled release oxymorphone tablets exhibit triple peaks in blood plasma concentration.
- T max time to peak plasma concentration
- T max has a large standard deviation due to the two comparable peaks in blood plasma concentration.
- Relative bioavailability determinations are set forth in Tables 11 and 12.
- the C max for the CR tablets is considerably lower, and the T max much higher than for the immediate release oxymorphone.
- the blood plasma level of oxymorphone remains high well past the 8 (or even the 12) hour dosing interval desired for an effective controlled release tablet.
- Treatments 3A and 3B Oxymorphone controlled release 20 mg tablets from Example 3. Subjects randomized to Treatment 3A received a single oral dose of one 20 mg oxymorphone controlled release tablet taken with 240 ml of water after a 10-hour fasting period. Subjects randomized to Treatment 3B received a single oral dose of one 20 mg oxymorphone controlled release tablet taken with 240 ml of water 10 minutes after a standardized high fat meal.
- Treatments 3C and 3D oxymorphone HCl solution, USP, 1.5 mg/ml 10 ml vials.
- Subjects randomized to Treatment 3C received a single oral dose of 10 mg (6.7 ml) oxymorphone solution taken with 240 ml of water after a 10-hour fasting period.
- Subjects randomized to Treatment 3D received a single oral dose of 10 mg (6.7 ml) oxymorphone solution taken with 240 ml of water 10 minutes after a standardized high-fat meal.
- the mean age of the subjects was 27 years (range of 19 through 38 years)
- the mean height of the subjects was 69.6 inches (range of 64.0 through 75.0 inches)
- the mean weight of the subjects was 169.0 pounds (range 117.0 through 202.0 pounds).
- Blood samples (7 ml) were collected during each study period at the 0 hour (predose), and at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 10, 12, 14, 16, 20, 24, 30, 36, and 48 hours post-dose (19 samples) for subjects randomized to Treatment 3A and Treatment 3B. Blood samples (7 ml) were collected during each study period at the 0 hour (predose), and at 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 3, 4, 5, 6, 8, 10, 12, 14, 16, 20, and 36 hours post-dose (21 samples) for subjects randomized to Treatment 3C and Treatment 3D.
- the mean oxymorphone plasma concentration versus time curves for Treatments 3A, 3B, 3C, and 3D are presented in FIG. 7 .
- the results have been normalized to a 20 mg dosage.
- the data is contained in Table 13.
- the arithmetic means of the plasma oxymorphone pharmacokinetic parameters and the statistics for all Treatments are summarized in Table 1.
- the objectives of this study were to assess the relative bioavailability of oxymorphone from oxymorphone controlled release (20 mg) compared to oxymorphone oral solution (10 mg) under both fasted and fed conditions, and to determine the effect of food on the bioavailability of oxymorphone from the controlled release formulation, oxymorphone CR, and from the oral solution.
- LS mean C max was 49% lower for oxymorphone controlled release tablets compared to the dose-normalized oral solution, based on LN-transformed data.
- Half-value duration was significantly longer for the controlled release formulation (means, 12 hours versus 2.5 hours).
- oxymorphone availability from oxymorphone controlled release 20 mg was similar compared to 10 mg oxymorphone oral solution normalized to a 20 mg dose (Treatment B versus Treatment D).
- LS mean AUC (0-inf) was 12% lower for oxymorphone CR.
- Mean F rel values calculated from AUC (0-inf) and AUC (0-24) , (0.89 and 0.83 respectively) also showed similar extent of oxymorphone availability from the tablet.
- LS mean C max was 46% lower for oxymorphone controlled release tablets compared to the dose-normalized oral solution, based on LN-transformed data.
- Mean T max was 5.7 hours for the tablet compared to 1.1 hours for the oral solution.
- Half-value duration was significantly longer for the controlled release formulation (means, 7.8 hours versus 3.1 hours).
- LS mean ratios were 97% for AUC (0-t) and 91% for C max (Treatment B versus A), based on LN-transformed data. This was consistent with the relative bioavailability determination from AUC (0-24) , since mean F rel was 0.97. Mean T max was later for the fed treatment compared to the fasted treatment (5.2 and 3.6 hours, respectively), and difference was significant.
- oxymorphone controlled release 20 mg tablets Under fasted conditions, oxymorphone controlled release 20 mg tablets exhibited similar availability 6-hydroxyoxymorphone compared to 10 mg oxymorphone oral solution normalized to a 20 mg dose (Treatment A versus Treatment C). From LN-transformed data, LS mean ratio for AUC (0-t) was 104.5%. Mean F rel (0.83) calculated from AUC (0-24) also showed similar extent of oxymorphone availability between the two treatments. Mean T max was 3.6 hours for the tablet compared to 0.88 for the oral solution. Half-value duration was significantly longer for the controlled release formulation (means, 11 hours versus 2.2 hours).
- the extent of oxymorphone availability from oxymorphone controlled release 20 mg tablets was similar under fed and fasted conditions since there was less than a 20% difference in LS mean AUC (0-t) and AUC (0-inf) values for each treatment, based on LN-transformed data. T max was unaffected by food; however, LS mean C max was increased 58% in the presence of the high fat meal. Both rate and extent of oxymorphone absorption from the oxymorphone oral solution were affected by food since LS mean C max and AUC values were increased approximately 50 and 30%, respectively. T max was unaffected by food.
- oxymorphone controlled release tablets Under both fed and fasted conditions, oxymorphone controlled release tablets exhibited similar extent of oxymorphone availability compared to oxymorphone oral solution since there was less than a 20% difference in LS mean AUC (0-t) and AUC (0-inf) values for each treatment.
- Bioavailability 6-hydroxyoxymorphone following oxymorphone controlled release 20 mg tablets was also similar under fed and fasted conditions since there was less than a 20% difference in LS mean C max and AUC values for each treatment. T max was later for the fed condition. The presence of food did not affect the extent of availability from oxymorphone oral solution since LS mean AUC values were less than 20% different. However, C max was decreased 35% in the presence of food. T max was unaffected by food. Under both fed and fasted conditions, oxymorphone controlled release tablets exhibited similar extent of availability compared to oxymorphone oral solution since there was less than a 20% difference in LS mean AUC values for each treatment.
- the mean 6-OH oxymorphone plasma concentration versus time curves for Treatments 3A, 3B, 3C, and 3D are presented in FIG. 8 .
- the data is contained in Table 17.
- healthy volunteers received a single dose of a 20 mg controlled release oxymorphone table on the morning of Day 1. Beginning on the morning of Day 3, the volunteers were administered a 20 mg controlled release oxymorphone tablet every 12 hours through the morning dose of Day 9.
- healthy volunteers received a single 10 mg dose of an immediate release oxymorphone tablet on the morning of Day 1. On the morning of Day 3, additional 10 mg immediate release tablets were administered every six hours through the first two doses on Day 9.
- FIG. 9 shows the average plasma concentrations of oxymorphone and 6-hydroxyoxymorphone for all subjects after a single dose either controlled release (CR) 20 mg or immediate release (IR) 10 mg oxymorphone.
- the data in the figure (as with the other relative experimental data herein) is normalized to a 20 mg dose.
- the immediate release tablet shows a classical curve, with a high, relatively narrow peak followed by an exponential drop in plasma concentration.
- the controlled release oxymorphone tablets show a lower peak with extended moderate levels of oxymorphone and 6-hydroxy oxymorphone.
- Table 19 shows the levels of oxymorphone and 6-hydroxy oxymorphone from FIG. 9 in tabular form.
- FIG. 10 shows the average plasma concentrations of oxymorphone and 6-hydroxyoxymorphone for all subjects in the steady state test, for doses of controlled release 20 mg tablets and immediate release 10 mg tablets of oxymorphone.
- the figure shows the plasma concentrations after the final controlled release tablet is given on Day 9, and the final immediate release tablet is given 12 hours thereafter.
- the steady state administration of the controlled release tablets clearly shows a steady moderate level of oxymorphone ranging from just over 1 ng/ml to almost 1.75 ng/ml over the course of a twelve hour period, where the immediate release tablet shows wide variations in blood plasma concentration.
- Table 20 shows the levels of oxymorphone and 6-hydroxyoxymorphone from FIG. 10 in tabular form.
- the present invention may also be used with other strengths of tablets. In each strength, it is important to note how a 20 mg tablet of the same composition (except for the change in strength) would act.
- the blood plasma levels and pain intensity information are provided for 20 mg tablets, however the present invention is also intended to encompass 5 to 80 mg controlled release tablets. For this reason, the blood plasma level of oxymorphone or 6-hydroxyoxymorphone in nanograms per milliliter of blood, per mg oxymorphone (ng/mg ⁇ ml) administered is measured. Thus at 0.02 ng/mg ⁇ ml, a 5 mg tablet should produce a minimum blood plasma concentration of 0.1 ng/ml.
- a stronger tablet will produce a higher blood plasma concentration of active molecule, generally proportionally.
- the blood plasma level of oxymorphone and 6-OH oxymorphone may more than quadruple compared to a 20 mg dose, although conventional treatment of low bioavailability substances would lead away from this conclusion. If this is the case, it may be because the body can only process a limited amount oxymorphone at one time. Once the bolus is processed, the blood level of oxymorphone returns to a proportional level.
- controlled release oxymorphone tablets are possible to produce and effective to use, which is most important, made possible with the high bioavailability of oxymorphone in a controlled release tablet.
- the intent of a controlled release opioid formulation is the long-term management of pain. Therefore, the performance of a composition when administered periodically (one to three times per day) over several days is important. In such a regime, the patient reaches a “steady state” where continued administration will produce the same results, when measured by duration of pain relief and blood plasma levels of pharmaceutical.
- Such a test is referred to as a “steady state” test and may require periodic administration over an extended time period ranging from several days to a week or more.
- the objectives of this study were to assess the relative bioavailability of oxymorphone from oxymorphone controlled release (40 mg) compared to oxymorphone immediate release (4.times.10 mg) under both fasted and fed conditions, and to determine the effect of food on the bioavailability of oxymorphone from the controlled release formulation, oxymorphone CR, and from the immediate release formulation, oxymorphone IR.
- Treatments 5A and 5B Oxymorphone controlled release 40 mg tablets from Table 2. Subjects randomized to Treatment 5A received a single oral dose of one 40 mg oxymorphone controlled release tablet taken with 240 ml of water after a 10-hour fasting period. Subjects randomized to Treatment 5B received a single oral dose of one 40 mg oxymorphone controlled release tablet taken with 240 ml of water 10 minutes after a standardized high fat meal.
- Treatments 5C and 5D Immediate release tablet (IR) 4.times.10 mg Oxymorphone.
- Subjects randomized to Treatment 5C received a single oral dose of 4.times.10 mg oxymorphone IR tablet taken with 240 ml of water after a 10-hour fasting period.
- Subjects randomized to Treatment 5D received a single oral dose of 4.times.10 mg oxymorphone IR tablet taken with 240 ml of water 10 minutes after a standardized high-fat meal.
- Blood samples (7 ml) were collected during each study period at the 0 hour (predose), and at 0.25, 0.5, 0.75, 1.0, 1.5, 2, 3, 4, 5, 6, 8, 10, 12, 24, 36, 48, 60, and 72 hours post-dose (19 samples) for subjects randomized to all Treatments.
- the mean oxymorphone plasma concentration versus time is presented in Table 22.
- the arithmetic means of the plasma oxymorphone pharmacokinetic parameters and the statistics for all Treatments are summarized in Table 23.
Abstract
Description
- This application is a continuation of U.S. patent application Ser. No. 10/190,192 filed Jul. 3, 2002 and claims priority to U.S. Provisional Patent Application Ser. Nos. 60/329,445 filed Oct. 15, 2001, 60/329,432 filed Oct. 15, 2001, 60/303,357 filed Jul. 6, 2001, and 60/329,444 filed Oct. 15, 2001, which are incorporated herein by reference to the extent permitted by law.
- Pain is the most frequently reported symptom and it is a common clinical problem which confronts the clinician. Many millions of people in the USA suffer from severe pain that, according to numerous recent reports, is chronically undertreated or inappropriately managed. The clinical usefulness of the analgesic properties of opioids has been recognized for centuries, and morphine and its derivatives have been widely employed for analgesia for decades in a variety of clinical pain states.
- Oxymorphone HCl (14-hydroxydihydromorphinone hydrochloride) is a semi-synthetic phenanthrene-derivative opioid agonist, widely used in the treatment of acute and chronic pain, with analgesic efficacy comparable to other opioid analgesics. Oxymorphone is currently marketed as an injection (1 mg/ml in 1 ml ampules; 1.5 mg/ml in 1 ml ampules; 1.5 mg/ml in 10 ml multiple dose vials) for intramuscular, subcutaneous, and intravenous administration, and as 5 mg rectal suppositories. At one time, 2 mg, 5 mg and 10 mg oral immediate release (IR) tablet formulations of oxymorphone HCl were marketed. Oxymorphone HCl is metabolized principally in the liver and undergoes conjugation with glucuronic acid and reduction to 6-alpha- and beta-hydroxy epimers.
- An important goal of analgesic therapy is to achieve continuous relief of chronic pain. Regular administration of an analgesic is generally required to ensure that the next dose is given before the effects of the previous dose have worn off. Compliance with opioids increases as the required dosing frequency decreases. Non-compliance results in suboptimal pain control and poor quality of life outcomes. (Ferrell B et al. Effects of controlled-release morphine on quality of life for cancer pain. Oncol. Nur. Forum 1989; 4:521-26). Scheduled, rather than “as needed” administration of opioids is currently recommended in guidelines for their use in chronic non-malignant pain. Unfortunately, evidence from prior clinical trials and clinical experience suggests that the short duration of action of immediate release oxymorphone would necessitate administration every 4-6 hours in order to maintain optimal levels of analgesia in chronic pain. A controlled release formulation which would allow less frequent dosing of oxymorphone would be useful in pain management.
- For instance, a controlled release formulation of morphine has been demonstrated to provide patients fewer interruptions in sleep, reduced dependence on caregivers, improved compliance, enhanced quality of life outcomes, and increased control over the management of pain. In addition, the controlled release formulation of morphine was reported to provide more constant plasma concentration and clinical effects, less frequent peak to trough fluctuations, reduced dosing frequency, and possibly fewer side effects. (Thirlwell M P et al., Pharmacokinetics and clinical efficacy of oral morphine solution and controlled-release morphine tablets in cancer patients. Cancer 1989; 63:2275-83; Goughnour B R et al., Analgesic response to single and multiple doses of controlled-release morphine tablets and morphine oral solution in cancer patients. Cancer 1989; 63:2294-97; Ferrell B. et al., Effects of controlled-release morphine on quality of life for cancer pain. Oncol. Nur. Forum 1989; 4:521-26.
- There are two factors associated with the metabolism of some drugs that may present problems for their use in controlled release systems. One is the ability of the drug to induce or inhibit enzyme synthesis, which may result in a fluctuating drug blood plasma level with chronic dosing. The other is a fluctuating drug blood level due to intestinal (or other tissue) metabolism or through a hepatic first-pass effect.
- Oxymorphone is metabolized principally in the liver, resulting in an oral bioavailability of about 10%. Evidence from clinical experience suggests that the short duration of action of immediate release oxymorphone necessitates a four hour dosing schedule to maintain optimal levels of analgesia. It would be useful to clinicians and patients alike to have controlled release dosage forms of oxymorphone to use to treat pain and a method of treating pain using the dosage forms.
- The present invention provides methods for relieving pain by administering a controlled release pharmaceutical tablet containing oxymorphone which produces at least a predetermined minimum blood plasma level for at least 12 hours after dosing, as well as tablets that produce the sustained pain relief over this time period.
-
FIG. 1 is a pharmacokinetic profile for 6-hydroxy oxymorphone with PID scores. -
FIG. 2 is a pharmacokinetic profile for oxymorphone with PID scores. -
FIG. 3 is a pharmacokinetic profile for 6-hydroxy oxymorphone with categorical pain scores. -
FIG. 4 is a pharmacokinetic profile for oxymorphone with categorical pain scores. -
FIG. 5 is a graph of the mean blood plasma concentration of oxymorphone versus time forclinical study 1. -
FIG. 6 is a graph of the mean blood plasma concentration of oxymorphone versus time forclinical study 2. -
FIG. 7 is a graph of the mean blood plasma concentration of oxymorphone versus time for clinical study 3. -
FIG. 8 is a graph of the mean blood plasma concentration of 6-hydroxy oxymorphone versus time for clinical study 3. -
FIG. 9 is a graph of the mean blood plasma concentration of oxymorphone for immediate and controlled release tablets from a single dose study. -
FIG. 10 is a graph of the mean blood plasma concentration of oxymorphone for immediate and controlled release tablets from a steady state study. - The present invention provides methods for alleviating pain for 12 to 24 hours using a single dose of a pharmaceutical composition by producing a blood plasma level of oxymorphone and/or 6-OH oxymorphone of at least a minimum value for at least 12 hours or more. As used herein, the terms “6-OH oxymorphone” and “6-hydroxy oxymorphone” are interchangeable and refer to the analog of oxymorphone having an alcohol (hydroxy) moiety that replaces the carboxy moiety found on oxymorphone at the 6-position.
- To overcome the difficulties associated with a 4-6 hourly dosing frequency of oxymorphone, this invention provides an oxymorphone controlled release oral solid dosage form, comprising a therapeutically effective amount of oxymorphone or a pharmaceutically acceptable salt of oxymorphone. It has been found that the decreased rate of release of oxymorphone from the oral controlled release formulation of this invention does not substantially decrease the bioavailability of the drug as compared to the same dose of a solution of oxymorphone administered orally. The bioavailability is sufficiently high and the release rate is such that a sufficient plasma level of oxymorphone and/or 6-OH oxymorphone is maintained to allow the controlled release dosage to be used to treat patients suffering moderate to severe pain with once or twice daily dosing. The dosing form of the present invention can also be used with thrice daily dosing.
- It is critical when considering the present invention that the difference between a controlled release tablet and an immediate release formulation be fully understood. In classical terms, an immediate release formulation releases at least 80% of its active pharmaceutical ingredient within 30 minutes. With reference to the present invention, the definition of an immediate release formulation will be broadened further to include a formulation which releases more than about 80% of its active pharmaceutical ingredient within 60 minutes in a standard USP Paddle Method dissolution test at 50 rpm in 500 ml media having a pH of between 1.2 and 6.8 at 37° C. “Controlled release” formulations, as referred to herein, will then encompass any formulations which release no more than about 80% of their active pharmaceutical ingredients within 60 minutes under the same conditions.
- The controlled release dosage form of this invention exhibits a dissolution rate in vitro, when measured by USP Paddle Method at 50 rpm in 500 ml media having a pH between 1.2 and 6.8 at 37° C., of about 15% to about 50% by weight oxymorphone released after 1 hour, about 45% to about 80% by weight oxymorphone released after 4 hours, and at least about 80% by weight oxymorphone released after 10 hours.
- When administered orally to humans, an effective controlled release dosage form of oxymorphone should exhibit the following in vivo characteristics: (a) peak plasma level of oxymorphone occurs within about 1 to about 8 hours after administration; (b) peak plasma level of 6-OH oxymorphone occurs within about 1 to about 8 hours after administration; (c) duration of analgesic effect is through about 8 to about 24 hours after administration; (d) relative oxymorphone bioavailability is in the range of about 0.5 to about 1.5 compared to an orally-administered aqueous solution of oxymorphone; and (e) the ratio of the area under the curve of blood plasma level vs. time for 6-OH oxymorphone compared to oxymorphone is in the range of about 0.5 to about 1.5. Of course, there is variation of these parameters among subjects, depending on the size and weight of the individual subject, the subject's age, individual metabolism differences, and other factors. Indeed, the parameters may vary in an individual from day to day. Accordingly, the parameters set forth above are intended to be mean values from a sufficiently large study so as to minimize the effect of individual variation in arriving at the values. A convenient method for arriving at such values is by conducting a study in accordance with standard FDA procedures such as those employed in producing results for use in a new drug application (or abbreviated new drug application) before the FDA. Any reference to mean values herein, in conjunction with desired results, refer to results from such a study, or some comparable study. Reference to mean values reported herein for studies actually conducted are arrived at using standard statistical methods as would be employed by one skilled in the art of pharmaceutical formulation and testing for regulatory approval.
- In one specific embodiment of the controlled release matrix form of the invention, the oxymorphone or salt of oxymorphone is dispersed in a controlled release delivery system that comprises a hydrophilic material which, upon exposure to gastrointestinal fluid, forms a gel matrix that releases oxymorphone at a controlled rate. The rate of release of oxymorphone from the matrix depends on the drug's partition coefficient between components of the matrix and the aqueous phase within the gastrointestinal tract. In a preferred form of this embodiment, the hydrophilic material of the controlled release delivery system comprises a mixture of a heteropolysaccharide gum and an agent capable of cross-linking the heteropolysaccharide in presence of gastrointestinal fluid. The controlled release delivery system may also comprise a water-soluble pharmaceutical diluent mixed with the hydrophilic material. Preferably, the cross-linking agent is a homopolysaccharide gum and the inert pharmaceutical diluent is a monosaccharide, a disaccharide, or a polyhydric alcohol, or a mixture thereof.
- In a specific preferred embodiment, the appropriate blood plasma levels of oxymorphone and 6-hydroxy oxymorphone are achieved using oxymorphone in the form of oxymorphone hydrochloride, wherein the weight ratio of heteropolysaccharide to homopolysaccharide is in the range of about 1:3 to about 3:1, the weight ratio of heteropolysaccharide to diluent is in the range of about 1:8 to about 8:1, and the weight ratio of heteropolysaccharide to oxymorphone hydrochloride is in the range of about 10:1 to about 1:10. A preferred heteropolysaccharide is xanthan gum and a preferred homopolysaccharide is locust bean gum. The dosage form also comprises a cationic cross-linking agent and a hydrophobic polymer. In the preferred embodiment, the dosage form is a tablet containing about 5 mg to about 80 mg of oxymorphone hydrochloride. In a most preferred embodiment, the tablet contains about 20 mg oxymorphone hydrochloride.
- The invention includes a method which comprises achieving appropriate blood plasma levels of drug while providing extended pain relief by administering one to three times per day to a patient suffering moderate to severe, acute or chronic pain, an oxymorphone controlled release oral solid dosage form of the invention in an amount sufficient to alleviate the pain for a period of about 8 hours to about 24 hours. This type and intensity of pain is often associated with cancer, autoimmune diseases, infections, surgical and accidental traumas and osteoarthritis.
- The invention also includes a method of making an oxymorphone controlled release oral solid dosage form of the invention which comprises mixing particles of oxymorphone or a pharmaceutically acceptable salt of oxymorphone with granules comprising the controlled release delivery system, preferably followed by directly compressing the mixture to form tablets.
- Pharmaceutically acceptable salts of oxymorphone which can be used in this invention include salts with the inorganic and organic acids which are commonly used to produce nontoxic salts of medicinal agents. Illustrative examples would be those salts formed by mixing oxymorphone with hydrochloric, sulfuric, nitric, phosphoric, phosphorous, hydrobromic, maleric, malic, ascorbic, citric or tartaric, pamoic, lauric, stearic, palmitic, oleic, myristic, lauryl sulfuric, naphthylenesulfonic, linoleic or linolenic acid, and the like. The hydrochloride salt is preferred.
- It has now been found that 6-OH oxymorphone, which is one of the metabolites of oxymorphone, may play a role in alleviating pain. When oxymorphone is ingested, part of the dosage gets into the bloodstream to provide pain relief, while another part is metabolized to 6-OH oxymorphone. This metabolite then enters the bloodstream to provide further pain relief. Thus it is believed that both the oxymorphone and 6-hydroxyoxymorphone levels are important to pain relief.
- The effectiveness of oxymorphone and 6-hydroxyoxymorphone at relieving pain and the pharmacokinetics of a single dose of oxymorphone were studied. The blood plasma levels of both oxymorphone and 6-hydroxyoxymorphone were measured in patients after a single dose of oxymorphone was administered. Similarly, the pain levels in patients were measured after a single administration of oxymorphone to determine the effective duration of pain relief from a single dose.
FIGS. 1-2 show the results of these tests, comparing pain levels to oxymorphone and 6-hydroxy oxymorphone levels. - For these tests, pain was measured using a Visual Analog Scale (VAS) or a Categorical Scale. The VAS scales consisted of a horizontal line, 100 mm in length. The left-hand end of the scale (0 mm) was marked with the descriptor “No Pain” and the right-hand end of the scale (100 mm) was marked with the descriptor “Extreme Pain”. Patients indicated their level of pain by making a vertical mark on the line. The VAS score was equal to the distance (in mm) from the left-hand end of the scale to the patient's mark. For the categorical scale, patients completed the following statement, “My pain at this time is” using the scale None=0, Mild=1, Moderate=2, or Severe=3.
- As can be seen from these figures, there is a correlation between pain relief and both oxymorphone and 6-hydroxyoxymorphone levels. As the blood plasma levels of oxymorphone and 6-hydroxyoxymorphone increase, pain decreases (and pain intensity difference and pain relief increases). Thus, to the patient, it is the level of oxymorphone and 6-hydroxyoxymorphone in the blood plasma which is most important. Further it is these levels which dictate the efficacy of the dosage form. A dosage form which maintains a sufficiently high level of oxymorphone or 6-hydroxyoxymorphone for a longer period need not be administered frequently. Such a result is accomplished by embodiments of the present invention.
- The oxymorphone controlled release oral solid dosage form of this invention can be made using any of several different techniques for producing controlled release oral solid dosage forms of opioid analgesics.
- In one embodiment, a core comprising oxymorphone or oxymorphone salt is coated with a controlled release film which comprises a water insoluble material and which upon exposure to gastrointestinal fluid releases oxymorphone from the core at a controlled rate. In a second embodiment, the oxymorphone or oxymorphone salt is dispersed in a controlled release delivery system that comprises a hydrophilic material which upon exposure to gastrointestinal fluid forms a gel matrix that releases oxymorphone at a controlled rate. A third embodiment is a combination of the first two: a controlled release matrix coated with a controlled release film. In a fourth embodiment the oxymorphone is incorporated into an osmotic pump. In any of these embodiments, the dosage form can be a tablet, a plurality of granules in a capsule, or other suitable form, and can contain lubricants, colorants, diluents, and other conventional ingredients.
- Osmotic Pump
- An osmotic pump comprises a shell defining an interior compartment and having an outlet passing through the shell. The interior compartment contains the active pharmaceutical ingredient. Generally the active pharmaceutical ingredient is mixed with excipients or other compositions such as a polyalkylene. The shell is generally made, at least in part, from a material (such as cellulose acetate) permeable to the liquid of the environment where the pump will be used, usually stomach acid. Once ingested, the pump operates when liquid diffuses through the shell of the pump. The liquid dissolves the composition to produce a saturated situation. As more liquid diffuses into the pump, the saturated solution containing the pharmaceutical is expelled from the pump through the outlet. This produces a nearly constant release of active ingredient, in the present case, oxymorphone.
- Controlled Release Coating
- In this embodiment, a core comprising oxymorphone or oxymorphone salt is coated with a controlled release film which comprises a water insoluble material. The film can be applied by spraying an aqueous dispersion of the water insoluble material onto the core. Suitable water insoluble materials include alkyl celluloses, acrylic polymers, waxes (alone or in admixture with fatty alcohols), shellac and zein. The aqueous dispersions of alkyl celluloses and acrylic polymers preferably contain a plasticizer such as triethyl citrate, dibutyl phthalate, propylene glycol, and polyethylene glycol. The film coat can contain a water-soluble material such as polyvinylpyrrolidone (PVP) or hydroxypropylmethylcellulose (HPMC).
- The core can be a granule made, for example, by wet granulation of mixed powders of oxymorphone or oxymorphone salt and a binding agent such as HPMC, or by coating an inert bead with oxymorphone or oxymorphone salt and a binding agent such as HPMC, or by spheronising mixed powders of oxymorphone or oxymorphone salt and a spheronising agent such as microcrystalline cellulose. The core can be a tablet made by compressing such granules or by compressing a powder comprising oxymorphone or oxymorphone salt.
- The in vitro and in vivo release characteristics of this controlled release dosage form can be modified by using mixtures of different water insoluble and water soluble materials, using different plasticizers, varying the thickness of the controlled release film, including release-modifying agents in the coating, or by providing passageways through the coating.
- Controlled Release Matrix
- It is important in the present invention that appropriate blood plasma levels of oxymorphone and 6-hydroxy oxymorphone be achieved and maintained for sufficient time to provide pain relief to a patient for a period of 12 to 24 hours. The preferred composition for achieving and maintaining the proper blood plasma levels is a controlled-release matrix. In this embodiment, the oxymorphone or oxymorphone salt is dispersed in a controlled release delivery system that comprises a hydrophilic material (gelling agent) which upon exposure to gastrointestinal fluid forms a gel matrix that releases oxymorphone at a controlled rate. Such hydrophilic materials include gums, cellulose ethers, acrylic resins, and protein-derived materials. Suitable cellulose ethers include hydroxyalkyl celluloses and carboxyalkyl celluloses, especially hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPC), HPMC, and carboxy methylcellulose (CMC). Suitable acrylic resins include polymers and copolymers of acrylic acid, methacrylic acid, methyl acrylate and methyl methacrylate. Suitable gums include heteropolysaccharide and homopolysaccharide gums, e.g., xanthan, tragacanth, acacia, karaya, alginates, agar, guar, hydroxypropyl guar, carrageenan, and locust bean gums.
- Preferably, the controlled release tablet of the present invention is formed from (I) a hydrophilic material comprising (a) a heteropolysaccharide; or (b) a heteropolysaccharide and a cross-linking agent capable of cross-linking said heteropolysaccharide; or (c) a mixture of (a), (b) and a polysaccharide gum; and (II) an inert pharmaceutical filler comprising up to about 80% by weight of the tablet; and (III) oxymorphone.
- The term “heteropolysaccharide” as used herein is defined as a water-soluble polysaccharide containing two or more kinds of sugar units, the heteropolysaccharide having a branched or helical configuration, and having excellent water-wicking properties and immense thickening properties.
- A preferred heteropolysaccharide is xanthan gum, which is a high molecular weight (>106) heteropolysaccharide. Other preferred heteropolysaccharides include derivatives of xanthan gum, such as deacylated xanthan gum, the carboxymethyl ether, and the propylene glycol ester.
- The cross linking agents used in the controlled release embodiment of the present invention which are capable of cross-linking with the heteropolysaccharide include homopolysaccharide gums such as the galactomannans, i.e., polysaccharides which are composed solely of mannose and galactose. Galactomannans which have higher proportions of unsubstituted mannose regions have been found to achieve more interaction with the heteropolysaccharide. Locust bean gum, which has a higher ratio of mannose to the galactose, is especially preferred as compared to other galactomannans such as guar and hydroxypropyl guar.
- Preferably, the ratio of heteropolysaccharide to homopolysaccharide is in the range of about 1:9 to about 9:1, preferably about 1:3 to about 3:1. Most preferably, the ratio of xanthan gum to polysaccharide material (i.e., locust bean gum, etc.) is preferably about 1:1.
- In addition to the hydrophilic material, the controlled release delivery system can also contain an inert pharmaceutical diluent such as a monosaccharide, a disaccharide, a polyhydric alcohol and mixtures thereof. The ratio of diluent to hydrophilic matrix-forming material is generally in the range of about 1:3 to about 3:1.
- The controlled release properties of the controlled release embodiment of the present invention may be optimized when the ratio of heteropolysaccharide gum to homopolysaccharide material is about 1:1, although heteropolysaccharide gum in an amount of from about 20 to about 80% or more by weight of the heterodisperse polysaccharide material provides an acceptable slow release product. The combination of any homopolysaccharide gums known to produce a synergistic effect when exposed to aqueous solutions may be used in accordance with the present invention. It is also possible that the type of synergism which is present with regard to the gum combination of the present invention could also occur between two homogeneous or two heteropolysaccharides. Other acceptable gelling agents which may be used in the present invention include those gelling agents well-known in the art. Examples include vegetable gums such as alginates, carrageenan, pectin, guar gum, xanthan gum, modified starch, hydroxypropylmethylcellulose, methylcellulose, and other cellulosic materials such as sodium carboxymethylcellulose and hydroxypropyl cellulose. This list is not meant to be exclusive.
- The combination of xanthan gum with locust bean gum with or without the other homopolysaccharide gums is an especially preferred gelling agent. The chemistry of certain of the ingredients comprising the excipients of the present invention such as xanthan gum is such that the excipients are considered to be self-buffering agents which are substantially insensitive to the solubility of the medicament and likewise insensitive to the pH changes along the length of the gastrointestinal tract.
- The inert filler of the sustained release excipient preferably comprises a pharmaceutically acceptable saccharide, including a monosaccharide, a disaccharide, or a polyhydric alcohol, and/or mixtures of any of the foregoing. Examples of suitable inert pharmaceutical fillers include sucrose, dextrose, lactose, microcrystalline cellulose, fructose, xylitol, sorbitol, mixtures thereof and the like. However, it is preferred that a soluble pharmaceutical filler such as lactose, dextrose, sucrose, or mixtures thereof be used.
- The cationic cross-linking agent which is optionally used in conjunction with the controlled release embodiment of the present invention may be monovalent or multivalent metal cations. The preferred salts are the inorganic salts, including various alkali metal and/or alkaline earth metal sulfates, chlorides, borates, bromides, citrates, acetates, lactates, etc. Specific examples of suitable cationic cross-linking agents include calcium sulfate, sodium chloride, potassium sulfate, sodium carbonate, lithium chloride, tripotassium phosphate, sodium borate, potassium bromide, potassium fluoride, sodium bicarbonate, calcium chloride, magnesium chloride, sodium citrate, sodium acetate, calcium lactate, magnesium sulfate and sodium fluoride. Multivalent metal cations may also be utilized. However, the preferred cationic cross-linking agents are bivalent. Particularly preferred salts are calcium sulfate and sodium chloride. The cationic cross-linking agents of the present invention are added in an amount effective to obtain a desirable increased gel strength due to the cross-linking of the gelling agent (e.g., the heteropolysaccharide and homopolysaccharide gums). In preferred embodiments, the cationic cross-linking agent is included in the sustained release excipient of the present invention in an amount from about 1 to about 20% by weight of the sustained release excipient, and in an amount about 0.5% to about 16% by weight of the final dosage form.
- In the controlled release embodiments of the present invention, the sustained release excipient comprises from about 10 to about 99% by weight of a gelling agent comprising a heteropolysaccharide gum and a homopolysaccharide gum, from about 1 to about 20% by weight of a cationic crosslinking agent, and from about 0 to about 89% by weight of an inert pharmaceutical diluent. In other embodiments, the sustained release excipient comprises from about 10 to about 75% gelling agent, from about 2 to about 15% cationic crosslinking agent, and from about 30 to about 75% inert diluent. In yet other embodiments, the sustained release excipient comprises from about 30 to about 75% gelling agent, from about 5 to about 10% cationic cross-linking agent, and from about 15 to about 65% inert diluent.
- The sustained release excipient used in this embodiment of the present invention (with or without the optional cationic cross-linking agent) may be further modified by incorporation of a hydrophobic material which slows the hydration of the gums without disrupting the hydrophilic matrix. This is accomplished in preferred embodiments of the present invention by granulating the sustained release excipient with the solution or dispersion of a hydrophobic material prior to the incorporation of the medicament. The hydrophobic polymer may be selected from an alkylcellulose such as ethylcellulose, other hydrophobic cellulosic materials, polymers or copolymers derived from acrylic or methacrylic acid esters, copolymers of acrylic and methacrylic acid esters, zein, waxes, shellac, hydrogenated vegetable oils, and any other pharmaceutically acceptable hydrophobic material known to those skilled in the art. The amount of hydrophobic material incorporated into the sustained release excipient is that which is effective to slow the hydration of the gums without disrupting the hydrophilic matrix formed upon exposure to an environmental fluid. In certain preferred embodiments of the present invention, the hydrophobic material is included in the sustained release excipient in an amount from about 1 to about 20% by weight. The solvent for the hydrophobic material may be an aqueous or organic solvent, or mixtures thereof.
- Examples of commercially available alkylcelluloses are Aquacoat coating (aqueous dispersion of ethylcellulose available from FMC of Philadelphia, Pa.) and Surelease coating (aqueous dispersion of ethylcellulose available from Colorcon of West Point, Pa.). Examples of commercially available acrylic polymers suitable for use as the hydrophobic material include Eudragit RS and RL polymers (copolymers of acrylic and methacrylic acid esters having a low content (e.g., 1:20 or 1:40) of quaternary ammonium compounds available from Rohm America of Piscataway, N.J.).
- The controlled release matrix useful in the present invention may also contain a cationic cross-linking agent such as calcium sulfate in an amount sufficient to cross-link the gelling agent and increase the gel strength, and an inert hydrophobic material such as ethyl cellulose in an amount sufficient to slow the hydration of the hydrophilic material without disrupting it. Preferably, the controlled release delivery system is prepared as a pre-manufactured granulation.
- Two controlled release delivery systems are prepared by dry blending xanthan gum, locust bean gum, calcium sulfate dehydrate, and dextrose in a high speed mixed/granulator for 3 minutes. A slurry is prepared by mixing ethyl cellulose with alcohol. While running choppers/impellers, the slurry is added to the dry blended mixture, and granulated for another 3 minutes. The granulation is then dried to a LOD (loss on drying) of less than about 10% by weight. The granulation is then milled using 20 mesh screen. The relative quantities of the ingredients are listed in the table below.
-
TABLE 1 Controlled Release Delivery System Formulation 1 Formulation 2Excipient (%) (%) Locust Bean Gum, FCC 25.0 30.0 Xanthan Gum, NF 25.0 30.0 Dextrose, USP 35.0 40.0 Calcium Sulfate Dihydrate, NF 10.0 0.0 Ethylcellulose, NF 5.0 0.0 Alcohol, SD3A (Anhydrous) (10)1 (20.0)1 Total 100.0 100.0 - A series of tablets containing different amounts of oxymorphone hydrochloride were prepared using the controlled
release delivery Formulation 1 shown in Table 1. The quantities of ingredients per tablet are as listed in the following table. -
TABLE 2 Sample Tablets of Differing Strengths Component Amounts in Tablet (mg) Oxymorphone HCl, 5 10 20 40 80 USP (mg) Controlled release 160 160 160 160 160 delivery system Silicified 20 20 20 20 20 microcrystalline cellulose, N.F. Sodium stearyl 2 2 2 2 2 fumarate, NF Total weight 187 192 202 222 262 Opadry (colored) 7.48 7.68 8.08 8.88 10.48 Opadry (clear) 0.94 0.96 1.01 1.11 1.31 - Two batches of 20 mg tablets were prepared as described above, using the controlled release delivery system of
Formulation 1. One batch was formulated to provide relatively fast controlled release, the other batch was formulated to provide relatively slow controlled release. Compositions of the tablets are shown in the following table. -
TABLE 3 Slow and Fast Release Compositions Example 2 Example 3 Example 4 Ingredients Slow (mg) Fast (mg) Fast (mg) Oxymorphone HCl, USP 20 20 20 Controlled Release Delivery System 360 160 160 Silicified Microcrystalline Cellulose, 20 20 20 NF Sodium stearyl fumarate, NF 4 2 2 Total weight 404 202 202 Coating (color or clear) 12 12 9 - The tablets of Examples 2, 3, and 4 were tested for in vitro release rate according to USP Procedure Drug Release U.S. Pat. No. 23. Release rate is a critical variable in attempting to control the blood plasma levels of oxymorphone and 6-hydroxyoxymorphone in a patient. Results are shown in the following Table 4.
-
TABLE 4 Release Rates of Slow and Fast Release Tablets Time Example 2 Example 3 Example 4 (hr) (Slow Release) (Fast Release) (Fast Release) 0.5 18.8 21.3 20.1 1 27.8 32.3 31.7 2 40.5 47.4 46.9 3 50.2 58.5 57.9 4 58.1 66.9 66.3 5 64.7 73.5 74.0 6 70.2 78.6 83.1 8 79.0 86.0 92.0 10 85.3 90.6 95.8 12 89.8 93.4 97.3 - Three clinical studies were conducted to assess the bioavailability (rate and extent of absorption) of oxymorphone.
Study 1 addressed the relative rates of absorption of controlled release (CR) oxymorphone tablets (of Examples 2 and 3) and oral oxymorphone solution in fasted patients.Study 2 addressed the relative rates of absorption of CR oxymorphone tablets (of Examples 2 and 3) and oral oxymorphone solution in fed patients. Study 3 addressed the relative rates of absorption of CR oxymorphone tablets (of Example 4) and oral oxymorphone solution in fed and fasted patients. - The blood plasma levels set forth herein as appropriate to achieve the objects of the present invention are mean blood plasma levels. As an example, if the blood plasma level of oxymorphone in a patient 12 hours after administration of a tablet is said to be at least 0.5 ng/ml, any particular individual may have lower blood plasma levels after 12 hours. However, the mean minimum concentration should meet the limitation set forth. To determine mean parameters, a study should be performed with a minimum of 8 adult subjects, in a manner acceptable for filing an application for drug approval with the US Food and Drug Administration. In cases where large fluctuations are found among patients, further testing may be necessary to accurately determine mean values.
- For all studies, the following procedures were followed, unless otherwise specified for a particular study.
- The subjects were not to consume any alcohol-, caffeine-, or xanthine-containing foods or beverages for 24 hours prior to receiving study medication for each study period. Subjects were to be nicotine and tobacco free for at least 6 months prior to enrolling in the study. In addition, over-the-counter medications were prohibited 7 days prior to dosing and during the study. Prescription medications were not allowed 14 days prior to dosing and during the study.
- Pharmacokinetic and Statistical Methods
- The following pharmacokinetic parameters were computed from the plasma oxymorphone concentration-time data:
- AUC(0-t) Area under the drug concentration-time curve from time zero to the time of the last quantifiable concentration (Ct), calculated using linear trapezoidal summation.
- AUC(0-inf) Area under the drug concentration-time curve from time zero to infinity. AUC(0-inf)=AUC(0-t)+Ct/Kel, where Kel is the terminal elimination rate constant.
- AUC(0-24) Partial area under the drug concentration-time curve from time zero to 24 hours.
- Cmax Maximum observed drug concentration.
- Tmax Time of the observed maximum drug concentration.
- Kel Elimination rate constant based on the linear regression of the terminal linear portion of the LN(concentration) time curve.
- Terminal elimination rate constants for use in the above calculations were in turn computed using linear regression of a minimum of three time points, at least two of which were consecutive. Kel values for which correlation coefficients were less than or equal to 0.8 were not reported in the pharmacokinetic parameter tables or included in the statistical analysis. Thus AUC(0-inf) was also not reported in these cases.
- A parametric (normal-theory) general linear model was applied to each of the above parameters (excluding Tmax), and the LN-transformed parameters Cmax, AUC(0-24), AUC(0-t), and AUC(0-inf). Initially, the analysis of variance (ANOVA) model included the following factors: treatment, sequence, subject within sequence, period, and carryover effect. If carryover effect was not significant, it was dropped from the model. The sequence effect was tested using the subject within sequence mean square, and all other main effects were tested using the residual error (error mean square).
- Plasma oxymorphone concentrations were listed by subject at each collection time and summarized using descriptive statistics. Pharmacokinetic parameters were also listed by subject and summarized using descriptive statistics.
-
Study 1—Two Controlled Release Formulations; Fasted Patients - Healthy volunteers received a single oral dose of 20 mg CR oxymorphone taken with 240 ml water after a 10-hour fast. Subjects received the tablets of Example 2 (
Treatment 1A) or Example 3 (Treatment 1B). Further subjects were given a single oral dose of 10 mg/10 ml oxymorphone solution in 180 ml apple juice followed with 60 ml water (Treatment 1C). The orally dosed solution was used to simulate an immediate release (IR) dose. - This study had a single-center, open-label, randomized, three-way crossover design using fifteen subjects. Subjects were in a fasted state following a 10-hour overnight fast. There was a 14-day washout interval between the three dose administrations. The subjects were confined to the clinic during each study period.
Subjects receiving Treatment 1C were confined for 18 hours andsubjects receiving Treatments subjects receiving Treatment -
TABLE 5 Mean Plasma Concentration vs. Time (ng/ml) Time (hr) Treatment 1ATreatment 1B Treatment 1C 0 0.000 0.000 0.0000 0.25 0.9489 0.5 0.2941 0.4104 1.3016 0.75 1.3264 1 0.5016 0.7334 1.3046 1.25 1.2041 1.5 0.5951 0.8192 1.0813 1.75 0.9502 2 0.6328 0.7689 0.9055 2.5 0.7161 3 0.5743 0.7341 0.6689 4 0.5709 0.6647 0.4879 5 0.7656 0.9089 0.4184 6 0.7149 0.7782 0.3658 7 0.6334 0.6748 0.3464 8 0.5716 0.5890 0.2610 10 0.4834 0.5144 0.2028 12 0.7333 0.6801 0.2936 14 0.6271 0.6089 0.2083 16 0.4986 0.4567 0.1661 18 0.4008 0.3674 0.1368 20 0.3405 0.2970 24 0.2736 0.2270 28 0.3209 0.2805 32 0.2846 0.2272 36 0.2583 0.1903 48 0.0975 0.0792 - The results are shown graphically in
FIG. 5 . In both Table 5 andFIG. 5 , the results are normalized to a 20 mg dosage. The immediate release liquid ofTreatment 1C shows a classical curve, with a high and relatively narrow peak, followed by an exponential drop in plasma concentration. However, the controlled release oxymorphone tablets exhibit triple peaks in blood plasma concentration. The first peak occurs (on average) at around 3 hours. The second peak of the mean blood plasma concentration is higher than the first, occurring around 6-7 hours, on average). - Occasionally, in an individual, the first peak is higher than the second, although generally this is not the case. This makes it difficult to determine the time to maximum blood plasma concentration (Tmax) because if the first peak is higher than the second, maximum blood plasma concentration (Cmax) occurs much earlier (at around 3 hours) than in the usual case where the second peak is highest. Therefore, when we refer to the time to peak plasma concentration (Tmax) unless otherwise specified, we refer to the time to the second peak. Further, when reference is made to the second peak, we refer to the time or blood plasma concentration at the point where the blood plasma concentration begins to drop the second time. Generally, where the first peak is higher than the second, the difference in the maximum blood plasma concentration at the two peaks is small. Therefore, this difference (if any) was ignored and the reported Cmax was the true maximum blood plasma concentration and not the concentration at the second peak.
-
TABLE 6 Pharmacokinetic Parameters of Plasma Oxymorphone for Study 1Treatment 1ATreatment 1BTreatment 1C Mean SD Mean SD Mean SD Cmax 0.8956 0.2983 1.0362 0.3080 2.9622 1.0999 Tmax 7.03 4.10 4.89 3.44 0.928 0.398 AUC(0-t) 17.87 6.140 17.16 6.395 14.24 5.003 AUC(0-inf) 19.87 6.382 18.96 6.908 16.99 5.830 T1/2el 10.9 2.68 11.4 2.88 6.96 4.61 Units: Cmax in ng/ml, Tmax in hours, AUC in ng * hr/ml, T1/2el in hours. - Relative bioavailability determinations are set forth in Tables 7 and 8. For these calculations, AUC was normalized for all treatments to a 20 mg dose.
-
TABLE 7 Relative Bioavailability (Frel) Determination Based on AUC(0-inf) Frel (1A vs. 1C) Frel (1B vs. 1C) Frel (1A vs. 1B) 1.193 .±. 0.203 1.121 .±. 0.211 1.108 .±. 0.152 -
TABLE 8 Relative Bioavailability Determination Based on AUC(0-18) Frel (1A vs. 1C) Frel (1B vs. 1C) Frel (1A vs. 1B) 0.733 .±. 0.098 0.783 .±. 0.117 0.944 .±. 0.110 -
Study 2—Two CR Formulations; Fed Patients - Healthy volunteers received a single oral dose of 20 mg CR oxymorphone taken with 240 ml water in a fed state. Subjects received the tablets of Example 2 (
Treatment 2A) or Example 3 (Treatment 2B). Further subjects were given a single oral dose of 10 mg/10 ml oxymorphone solution in 180 ml apple juice followed with 60 ml water (Treatment 2C). The orally dosed solution was used to simulate an immediate release (IR) dose. - This study had a single-center, open-label, randomized, three-way crossover design using fifteen subjects. The subjects were in a fed state, after a 10-hour overnight fast followed by a standardized FDA high-fat breakfast. There was a 14-day washout interval between the three dose administrations. The subjects were confined to the clinic during each study period.
Subjects receiving Treatment 2C were confined for 18 hours andsubjects receiving Treatments subjects receiving Treatment -
TABLE 9 Mean Plasma Concentration vs. Time (ng/ml) Time (hr) Treatment 2ATreatment 2B Treatment 2C 0 0.000 0.000 0.0000 0.25 1.263 0.5 0.396 .0553 1.556 0.75 1.972 1 0.800 1.063 1.796 1.25 1.795 1.5 1.038 1.319 1.637 1.75 1.467 2 1.269 1.414 1.454 2.5 1.331 3 1.328 1.540 1.320 4 1.132 1.378 1.011 5 1.291 1.609 0.731 6 1.033 1.242 0.518 7 0.941 0.955 0.442 8 0.936 0.817 0.372 10 0.669 0.555 0.323 12 0.766 0.592 0.398 14 0.641 0.519 0.284 16 0.547 0.407 0.223 18 0.453 0.320 0.173 20 0.382 0.280 24 0.315 0.254 28 0.352 0.319 32 0.304 0.237 36 0.252 0.207 48 0.104 0.077 - The results are shown graphically in
FIG. 6 . Again, the results have been normalized to a 20 mg dosage. As withStudy 1, the immediate release liquid ofTreatment 2C shows a classical curve, with a high and relatively narrow peak, followed by an exponential drop in plasma concentration, while the controlled release oxymorphone tablets exhibit triple peaks in blood plasma concentration. Thus, again when we refer to the time to peak plasma concentration (Tmax) unless otherwise specified, we refer to the time to the second peak. -
TABLE 10 Pharmacokinetic Parameters of Plasma Oxymorphone for Study 2Treatment 2ATreatment 2BTreatment 2C Mean SD Mean SD Mean SD Cmax 1.644 0.365 1.944 0.465 4.134 0.897 Tmax 3.07 1.58 2.93 1.64 0.947 0.313 AUC(0-t) 22.89 5.486 21.34 5.528 21.93 5.044 AUC(0-inf) 25.28 5.736 23.62 5.202 24.73 6.616 T1/2el 12.8 3.87 11.0 3.51 5.01 2.02 Units: Cmax in ng/ml, Tmax in hours, AUC in ng * hr/ml, T1/2el in hours. - In Table 10, the Tmax has a large standard deviation due to the two comparable peaks in blood plasma concentration. Relative bioavailability determinations are set forth in Tables 11 and 12.
-
TABLE 11 Relative Bioavailability Determination Based on AUC(0-inf) Frel (2A vs. 2C) Frel (2B vs. 2C) Frel (2A vs. 2B) 1.052 .±. 0.187 0.949 .±. 0.154 1.148 .±. 0.250 -
TABLE 12 Relative bioavailability Determination Based on AUC(0-18) Frel (2A vs. 2C) Frel (2B vs. 2C) Frel (2A vs. 2B) 0.690 .±. 0.105 0.694 .±. 0.124 1.012 .±. 0.175 - As may be seen from tables 5 and 10 and
FIGS. 1 and 2 , the Cmax for the CR tablets (treatments - Study 3—One Controlled Release Formulation; Fed and Fasted Patients
- This study had a single-center, open-label, analytically blinded, randomized, four-way crossover design. Subjects randomized to
Treatment 3A andTreatment 3C, as described below, were in a fasted state following a 10-hour overnight fast. Subjects randomized toTreatment 3B andTreatment 3D, as described below, were in the fed state, having had a high fat meal, completed ten minutes prior to dosing. There was a 14-day washout interval between the four dose administrations. The subjects were confined to the clinic during each study period. Subjects assigned to receiveTreatment 3A andTreatment 3B were discharged from the clinic on Day 3 following the 48-hour procedures, and subjects assigned to receiveTreatment 3C andTreatment 3D were discharged from the clinic onDay 2 following the 36-hour procedures. OnDay 1 of each study period the subjects received one of four treatments: -
Treatments release 20 mg tablets from Example 3. Subjects randomized toTreatment 3A received a single oral dose of one 20 mg oxymorphone controlled release tablet taken with 240 ml of water after a 10-hour fasting period. Subjects randomized toTreatment 3B received a single oral dose of one 20 mg oxymorphone controlled release tablet taken with 240 ml ofwater 10 minutes after a standardized high fat meal. -
Treatments ml 10 ml vials. Subjects randomized toTreatment 3C received a single oral dose of 10 mg (6.7 ml) oxymorphone solution taken with 240 ml of water after a 10-hour fasting period. Subjects randomized toTreatment 3D received a single oral dose of 10 mg (6.7 ml) oxymorphone solution taken with 240 ml ofwater 10 minutes after a standardized high-fat meal. - A total of 28 male subjects were enrolled in the study, and 24 subjects completed the study. The mean age of the subjects was 27 years (range of 19 through 38 years), the mean height of the subjects was 69.6 inches (range of 64.0 through 75.0 inches), and the mean weight of the subjects was 169.0 pounds (range 117.0 through 202.0 pounds).
- A total of 28 subjects received at least one treatment. Only subjects who completed all 4 treatments were included in the summary statistics and statistical analysis.
- Blood samples (7 ml) were collected during each study period at the 0 hour (predose), and at 0.5, 1, 1.5, 2, 3, 4, 5, 6, 8, 10, 12, 14, 16, 20, 24, 30, 36, and 48 hours post-dose (19 samples) for subjects randomized to
Treatment 3A andTreatment 3B. Blood samples (7 ml) were collected during each study period at the 0 hour (predose), and at 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 3, 4, 5, 6, 8, 10, 12, 14, 16, 20, and 36 hours post-dose (21 samples) for subjects randomized toTreatment 3C andTreatment 3D. - The mean oxymorphone plasma concentration versus time curves for
Treatments FIG. 7 . The results have been normalized to a 20 mg dosage. The data is contained in Table 13. The arithmetic means of the plasma oxymorphone pharmacokinetic parameters and the statistics for all Treatments are summarized in Table 1. -
TABLE 13 Mean Plasma Concentration vs. Time (ng/ml) Treatment Treatment Treatment Treatment Time (hr) 3A 3B 3C 3D 0 0.0084 0.0309 0.0558 0.0000 0.25 0.5074 0.9905 0.5 0.3853 0.3380 0.9634 1.0392 0.75 0.9753 1.3089 1 0.7710 0.7428 0.8777 1.3150 1.25 0.8171 1.2274 1.5 0.7931 1.0558 0.7109 1.1638 1.75 0.6357 1.0428 2 0.7370 1.0591 0.5851 0.9424 3 0.6879 0.9858 0.4991 0.7924 4 0.6491 0.9171 0.3830 0.7277 5 0.9312 1.4633 0.3111 0.6512 6 0.7613 1.0441 0.2650 0.4625 8 0.5259 0.7228 0.2038 0.2895 10 0.4161 0.5934 0.1768 0.2470 12 0.5212 0.5320 0.2275 0.2660 14 0.4527 0.4562 0.2081 0.2093 16 0.3924 0.3712 0.1747 0.1623 20 0.2736 0.3021 0.1246 0.1144 24 0.2966 0.2636 0.1022 0.1065 30 0.3460 0.3231 36 0.2728 0.2456 0.0841 0.0743 48 0.1263 0.1241 -
TABLE 14 Pharmacokinetic Parameters of Plasma Oxymorphone for Study 3 Treatment 3ATreatment 3BTreatment 3CTreatment 3D Mean SD Mean SD Mean SD Mean SD Cmax 1.1410 0.4537 1.7895 0.6531 2.2635 1.0008 3.2733 1.3169 Tmax 5.57 7.14 5.65 9.39 0.978 1.14 1.11 0.768 AUC(0-t) 11.64 3.869 14.27 4.976 12.39 4.116 17.30 5.259 AUC(0-inf) 17.71 8.471 19.89 6.408 14.53 4.909 19.28 6.030 T1/2el 19.29 5.028 21.29 6.559 18.70 6.618 25.86 10.03 12.3 3.99 12.0 3.64 16.2 11.4 20.6 19.3 - The relative bioavailability calculations are summarized in tables 15 and 16.
-
TABLE 15 Relative Bioavailability Determination Based on AUC(0-inf) Frel (3A vs. 3C) Frel (3B vs. 3D) Frel (3D vs. 3C) Frel (3B vs. 3A) 1.040 .±. 0.1874 0.8863 .±. 0.2569 1.368 .±. 0.4328 1.169 .±. 0.2041 -
TABLE 16 Relative bioavailability Determination Based on AUC(0-24) Frel (3A vs. 3C) Frel (3B vs. 3D) Frel (3D vs. 3C) Frel (3B vs. 3A) 0.9598 .±. 0.2151 0.8344 .±. 0.100 1.470 .±. 0.3922 1.299 .±. 0.4638 - The objectives of this study were to assess the relative bioavailability of oxymorphone from oxymorphone controlled release (20 mg) compared to oxymorphone oral solution (10 mg) under both fasted and fed conditions, and to determine the effect of food on the bioavailability of oxymorphone from the controlled release formulation, oxymorphone CR, and from the oral solution.
- The presence of a high fat meal had a substantial effect on the oxymorphone Cmax, but less of an effect on oxymorphone AUC from oxymorphone controlled release tablets. Least Squares (LS) mean Cmax was 58% higher and LS mean AUC(0-t) and AUC(0-inf) were 18% higher for the fed condition (Treatment B) compared to the fasted condition (Treatment A) based on LN-transformed data. This was consistent with the relative bioavailability determination from AUC(0-inf) since mean Frel was 1.17. Mean Tmax values were similar (approximately 5.6 hours), and no significant difference in Tmax was shown using nonparametric analysis. Half value durations were significantly different between the two treatments.
- The effect of food on oxymorphone bioavailability from the oral solution was more pronounced, particularly in terms of AUC. LS mean Cmax was 50% higher and LS mean AUC(0-t) and AUC(0-inf) were 32-34% higher for the fed condition (Treatment D) compared to the fasted condition (Treatment C) based on LN-transformed data. This was consistent with the relative bioavailability determination from AUC(0-inf) since mean Frel was 1.37. Mean Tmax (approximately 1 hour) was similar for the two treatments and no significant difference was shown.
- Under fasted conditions, oxymorphone controlled
release 20 mg tablets exhibited similar extent of oxymorphone availability compared to 10 mg oxymorphone oral solution normalized to a 20 mg dose (Treatment A versus Treatment C). From LN-transformed data, LS mean AUC(0-t) was 17% higher for oxymorphone CR, whereas LS mean AUC(0-inf) values were nearly equal (mean ratio=99%). Mean Frel values calculated from AUC(0-inf) and AUC(0-24), (1.0 and 0.96, respectively) also showed similar extent of oxymorphone availability between the two treatments. - As expected, there were differences in parameters reflecting rate of absorption. LS mean Cmax was 49% lower for oxymorphone controlled release tablets compared to the dose-normalized oral solution, based on LN-transformed data. Half-value duration was significantly longer for the controlled release formulation (means, 12 hours versus 2.5 hours).
- Under fed conditions, oxymorphone availability from oxymorphone controlled
release 20 mg was similar compared to 10 mg oxymorphone oral solution normalized to a 20 mg dose (Treatment B versus Treatment D). From LN-transformed data, LS mean AUC(0-inf) was 12% lower for oxymorphone CR. Mean Frel values calculated from AUC(0-inf) and AUC(0-24), (0.89 and 0.83 respectively) also showed similar extent of oxymorphone availability from the tablet. As expected, there were differences in parameters reflecting rate of absorption. LS mean Cmax was 46% lower for oxymorphone controlled release tablets compared to the dose-normalized oral solution, based on LN-transformed data. Mean Tmax was 5.7 hours for the tablet compared to 1.1 hours for the oral solution. Half-value duration was significantly longer for the controlled release formulation (means, 7.8 hours versus 3.1 hours). - The presence of a high fat meal did not appear to substantially affect the availability of 6-hydroxyoxymorphone following administration of oxymorphone controlled release tablets. LS mean ratios were 97% for AUC(0-t) and 91% for Cmax (Treatment B versus A), based on LN-transformed data. This was consistent with the relative bioavailability determination from AUC(0-24), since mean Frel was 0.97. Mean Tmax was later for the fed treatment compared to the fasted treatment (5.2 and 3.6 hours, respectively), and difference was significant.
- Under fasted conditions, oxymorphone controlled
release 20 mg tablets exhibited similar availability 6-hydroxyoxymorphone compared to 10 mg oxymorphone oral solution normalized to a 20 mg dose (Treatment A versus Treatment C). From LN-transformed data, LS mean ratio for AUC(0-t) was 104.5%. Mean Frel (0.83) calculated from AUC(0-24) also showed similar extent of oxymorphone availability between the two treatments. Mean Tmax was 3.6 hours for the tablet compared to 0.88 for the oral solution. Half-value duration was significantly longer for the controlled release formulation (means, 11 hours versus 2.2 hours). - Under fed conditions, availability 6-hydroxyoxymorphone from oxymorphone controlled
release 20 mg was similar compared to 10 mg oxymorphone oral solution normalized to a 20 mg dose (Treatment B versus Treatment D). From LN-transformed data, LS mean AUC(0-t) was 14% higher for oxymorphone CR. Mean Frel (0.87) calculated from AUC(0-24) also indicated similar extent of availability between the treatments. Mean Tmax was 5.2 hours for the tablet compared to 1.3 hour for the oral solution. Half-value duration was significantly longer for the controlled release formulation (means, 14 hours versus 3.9 hours). - The extent of oxymorphone availability from oxymorphone controlled
release 20 mg tablets was similar under fed and fasted conditions since there was less than a 20% difference in LS mean AUC(0-t) and AUC(0-inf) values for each treatment, based on LN-transformed data. Tmax was unaffected by food; however, LS mean Cmax was increased 58% in the presence of the high fat meal. Both rate and extent of oxymorphone absorption from the oxymorphone oral solution were affected by food since LS mean Cmax and AUC values were increased approximately 50 and 30%, respectively. Tmax was unaffected by food. Under both fed and fasted conditions, oxymorphone controlled release tablets exhibited similar extent of oxymorphone availability compared to oxymorphone oral solution since there was less than a 20% difference in LS mean AUC(0-t) and AUC(0-inf) values for each treatment. - Bioavailability 6-hydroxyoxymorphone following oxymorphone controlled
release 20 mg tablets was also similar under fed and fasted conditions since there was less than a 20% difference in LS mean Cmax and AUC values for each treatment. Tmax was later for the fed condition. The presence of food did not affect the extent of availability from oxymorphone oral solution since LS mean AUC values were less than 20% different. However, Cmax was decreased 35% in the presence of food. Tmax was unaffected by food. Under both fed and fasted conditions, oxymorphone controlled release tablets exhibited similar extent of availability compared to oxymorphone oral solution since there was less than a 20% difference in LS mean AUC values for each treatment. - The mean 6-OH oxymorphone plasma concentration versus time curves for
Treatments FIG. 8 . The data is contained in Table 17. -
TABLE 17 Mean Plasma Concentration vs. Time (ng/ml) 6-Hydroxyoxymorphone Treatment Treatment Treatment Treatment Time (hr) 3A 3B 3C 3D 0 0.0069 0.0125 0.0741 0.0000 0.25 0.7258 0.4918 0.5 0.5080 0.1879 1.2933 0.5972 0.75 1.3217 0.7877 1 1.0233 0.4830 1.1072 0.8080 1.25 1.0069 0.7266 1.5 1.1062 0.7456 0.8494 0.7001 1.75 0.7511 0.6472 2 1.0351 0.7898 0.6554 0.5758 3 0.9143 0.7619 0.6196 0.5319 4 0.8522 0.7607 0.4822 0.5013 5 0.8848 0.8548 0.3875 0.4448 6 0.7101 0.7006 0.3160 0.3451 8 0.5421 0.5681 0.2525 0.2616 10 0.4770 0.5262 0.2361 0.2600 12 0.4509 0.4454 0.2329 0.2431 14 0.4190 0.4399 0.2411 0.2113 16 0.4321 0.4230 0.2385 0.2086 20 0.3956 0.4240 0.2234 0.1984 24 0.4526 0.4482 0.2210 0.2135 30 0.4499 0.4708 36 0.3587 0.3697 0.1834 0.1672 48 0.3023 0.3279 -
TABLE 18 Pharmacokinetic Parameters of Plasma 6-Hydroxyoxymorphone for Study 3 Treatment 3ATreatment 3BTreatment 3CTreatment 3D Mean SD Mean SD Mean SD Mean SD Cmax 1.2687 0.5792 1.1559 0.4848 1.5139 0.7616 0.9748 0.5160 Tmax 3.61 7.17 5.20 9.52 0.880 0.738 1.30 1.04 AUC(o-t) 22.47 10.16 22.01 10.77 10.52 4.117 9.550 4.281 AUC(o-inf) 38.39 23.02 42.37 31.57 20.50 7.988 23.84 11.37 T1/2el 39.1 36.9 39.8 32.6 29.3 12.0 44.0 35.00 -
Study 4—ControlledRelease 20 mg vsImmediate Release 10 mg - A study was conducted to compare the bioavailability and pharmacokinetics of controlled release and immediate release oxymorphone tablets under single-dose and multiple-dose (steady state) conditions. For the controlled release study, healthy volunteers received a single dose of a 20 mg controlled release oxymorphone table on the morning of
Day 1. Beginning on the morning of Day 3, the volunteers were administered a 20 mg controlled release oxymorphone tablet every 12 hours through the morning dose of Day 9. For the immediate release study, healthy volunteers received a single 10 mg dose of an immediate release oxymorphone tablet on the morning ofDay 1. On the morning of Day 3, additional 10 mg immediate release tablets were administered every six hours through the first two doses on Day 9. -
FIG. 9 shows the average plasma concentrations of oxymorphone and 6-hydroxyoxymorphone for all subjects after a single dose either controlled release (CR) 20 mg or immediate release (IR) 10 mg oxymorphone. The data in the figure (as with the other relative experimental data herein) is normalized to a 20 mg dose. The immediate release tablet shows a classical curve, with a high, relatively narrow peak followed by an exponential drop in plasma concentration. The controlled release oxymorphone tablets show a lower peak with extended moderate levels of oxymorphone and 6-hydroxy oxymorphone. Table 19 shows the levels of oxymorphone and 6-hydroxy oxymorphone fromFIG. 9 in tabular form. -
TABLE 19 Mean Plasma Concentration (ng/ml) Oxymorphone 6-Hydroxyoxymorphone Controlled Immediate Controlled Immediate Release Release Release Release Hour 20 mg 10 mg 20 mg 10 mg 0.00 0.00 0.00 0.00 0.00 0.25 0.22 1.08 0.14 0.73 0.50 0.59 1.69 0.45 1.22 1.00 0.77 1.19 0.53 0.79 1.50 0.84 0.91 0.53 0.57 2.00 0.87 0.75 0.60 0.47 3.00 0.83 0.52 0.55 0.34 4.00 0.73 0.37 0.53 0.27 5.00 0.94 0.36 0.46 0.23 6.00 0.81 0.28 0.41 0.18 8.00 0.73 0.20 0.37 0.14 10.0 0.60 0.19 0.35 0.15 12.0 0.67 0.25 0.32 0.13 16.0 0.39 0.16 0.29 0.13 24.0 0.23 0.07 0.29 0.13 30.0 0.12 0.01 0.17 0.04 36.0 0.05 0.00 0.11 0.00 48.0 0.00 0.00 0.07 0.01 -
FIG. 10 shows the average plasma concentrations of oxymorphone and 6-hydroxyoxymorphone for all subjects in the steady state test, for doses of controlledrelease 20 mg tablets andimmediate release 10 mg tablets of oxymorphone. The figure shows the plasma concentrations after the final controlled release tablet is given on Day 9, and the final immediate release tablet is given 12 hours thereafter. The steady state administration of the controlled release tablets clearly shows a steady moderate level of oxymorphone ranging from just over 1 ng/ml to almost 1.75 ng/ml over the course of a twelve hour period, where the immediate release tablet shows wide variations in blood plasma concentration. Table 20 shows the levels of oxymorphone and 6-hydroxyoxymorphone fromFIG. 10 in tabular form. -
TABLE 20 Summary of Mean Plasma Concentration (ng/ml) Oxymorphone 6-Hydroxyoxymorphone Controlled Immediate Controlled Immediate Release Release Release Release Day Hour 20 mg 10 mg 20 mg 10 mg 4 0.00 1.10 0.75 0.89 0.72 5 0.00 1.12 0.84 1.15 0.88 6 0.00 1.20 0.92 1.15 0.87 7 0.00 1.19 0.91 1.27 1.00 8 0.00 1.19 0.86 1.29 0.98 9 0.00 1.03 1.07 1.09 1.05 0.25 2.64 1.70 0.50 3.12 1.50 2.09 1.00 2.47 1.70 1.68 1.50 2.05 1.63 1.55 2.00 1.78 1.64 1.30 3.00 1.27 1.47 1.11 4.00 0.98 1.39 0.98 5.00 1.01 1.21 0.89 6.00 0.90 1.06 0.84 6.25 1.17 0.88 6.50 1.88 1.06 7.00 2.12 1.20 7.50 2.24 1.15 8.00 1.32 2.01 0.97 1.03 9.00 1.52 0.90 10.0 1.32 1.24 0.85 0.84 11.0 1.11 0.74 12.0 1.18 0.96 0.79 0.70 -
TABLE 21 Mean Single-Dose Pharmacokinetic Results Controlled Immediate Release 20 mg Release 10 mg oxymor- 6-OH- oxymor- 6-OH- phone oxymorphone phone oxymorphone AUC(o-t) 14.74 11.54 7.10 5.66 AUC(o-inf) 15.33 16.40 7.73 8.45 Cmax (ng/ml) 1.12 0.68 1.98 1.40 Tmax (hr) 5.00 2.00 0.50 0.50 T½ (hr) 9.25 26.09 10.29 29.48 - Parent 6-OH oxymorphone AUC(o-t) values were lower than the parent compound after administration of either dosage form, but the AUC(o-inf) values are slightly higher due to the longer half-life for the metabolite. This relationship was similar for both the immediate-release (IR) and controlled release (CR) dosage forms. As represented by the average plasma concentration graph, the CR dosage form has a significantly longer time to peak oxymorphone concentration and a lower peak oxymorphone concentration. The 6-OH oxymorphone peak occurred sooner than the parent peak following the CR dosage form, and simultaneously with the parent peak following the IR dosage form.
- It is important to note that while the present invention is described and exemplified using 20 mg tablets, the invention may also be used with other strengths of tablets. In each strength, it is important to note how a 20 mg tablet of the same composition (except for the change in strength) would act. The blood plasma levels and pain intensity information are provided for 20 mg tablets, however the present invention is also intended to encompass 5 to 80 mg controlled release tablets. For this reason, the blood plasma level of oxymorphone or 6-hydroxyoxymorphone in nanograms per milliliter of blood, per mg oxymorphone (ng/mg·ml) administered is measured. Thus at 0.02 ng/mg·ml, a 5 mg tablet should produce a minimum blood plasma concentration of 0.1 ng/ml. A stronger tablet will produce a higher blood plasma concentration of active molecule, generally proportionally. Upon administration of a higher dose tablet, for example 80 mg, the blood plasma level of oxymorphone and 6-OH oxymorphone may more than quadruple compared to a 20 mg dose, although conventional treatment of low bioavailability substances would lead away from this conclusion. If this is the case, it may be because the body can only process a limited amount oxymorphone at one time. Once the bolus is processed, the blood level of oxymorphone returns to a proportional level.
- It is the knowledge that controlled release oxymorphone tablets are possible to produce and effective to use, which is most important, made possible with the high bioavailability of oxymorphone in a controlled release tablet. This also holds true for continuous periodic administration of controlled release formulations. The intent of a controlled release opioid formulation is the long-term management of pain. Therefore, the performance of a composition when administered periodically (one to three times per day) over several days is important. In such a regime, the patient reaches a “steady state” where continued administration will produce the same results, when measured by duration of pain relief and blood plasma levels of pharmaceutical. Such a test is referred to as a “steady state” test and may require periodic administration over an extended time period ranging from several days to a week or more. Of course, since a patient reaches steady state in such a test, continuing the test for a longer time period should not affect the results. Further, when testing blood plasma levels in such a test, if the time period for testing exceeds the interval between doses, it is important the regimen be stopped after the test is begun so that observations of change in blood level and pain relief may be made without a further dose affecting these parameters.
-
Study 5—ControlledRelease 40 mg vs Immediate Release 4.times.10 mg under Fed and Fasting Conditions - The objectives of this study were to assess the relative bioavailability of oxymorphone from oxymorphone controlled release (40 mg) compared to oxymorphone immediate release (4.times.10 mg) under both fasted and fed conditions, and to determine the effect of food on the bioavailability of oxymorphone from the controlled release formulation, oxymorphone CR, and from the immediate release formulation, oxymorphone IR.
- This study had a single-center, open-label, analytically blinded, randomized, four-way crossover design. Subjects randomized to Treatment 5A and Treatment 5C, as described below, were in a fasted state following a 10-hour overnight fast. Subjects randomized to Treatment 5B and Treatment 5D, as described below, were in the fed state, having had a high fat meal, completed ten minutes prior to dosing. There was a 14-day washout interval between the four dose administrations. The subjects were confined to the clinic during each study period. Subject assigned to receive Treatment 5A and Treatment 5B were discharged from the clinic on Day 3 following the 48-hour procedures, and subjects assigned to receive Treatment 5C and Treatment 5D were discharged from the clinic on
Day 2 following the 36-hour procedures. OnDay 1 of each study period the subjects received one of four treatments: - Treatments 5A and 5B: Oxymorphone controlled
release 40 mg tablets from Table 2. Subjects randomized to Treatment 5A received a single oral dose of one 40 mg oxymorphone controlled release tablet taken with 240 ml of water after a 10-hour fasting period. Subjects randomized to Treatment 5B received a single oral dose of one 40 mg oxymorphone controlled release tablet taken with 240 ml ofwater 10 minutes after a standardized high fat meal. - Treatments 5C and 5D: Immediate release tablet (IR) 4.times.10 mg Oxymorphone. Subjects randomized to Treatment 5C received a single oral dose of 4.times.10 mg oxymorphone IR tablet taken with 240 ml of water after a 10-hour fasting period. Subjects randomized to Treatment 5D received a single oral dose of 4.times.10 mg oxymorphone IR tablet taken with 240 ml of
water 10 minutes after a standardized high-fat meal. - A total of 28 male subjects were enrolled in the study, and 25 subjects completed the study. A total of 28 subjects received at least one treatment. Only subjects who completed all 4 treatments were included in the summary statistics and statistical analysis.
- Blood samples (7 ml) were collected during each study period at the 0 hour (predose), and at 0.25, 0.5, 0.75, 1.0, 1.5, 2, 3, 4, 5, 6, 8, 10, 12, 24, 36, 48, 60, and 72 hours post-dose (19 samples) for subjects randomized to all Treatments.
- The mean oxymorphone plasma concentration versus time is presented in Table 22. The arithmetic means of the plasma oxymorphone pharmacokinetic parameters and the statistics for all Treatments are summarized in Table 23.
-
TABLE 22 Mean Plasma Concentration vs. Time (ng/ml) Treatment Treatment Treatment Treatment Time (hr) 5A 5B 5C 5D 0 0.00 0.00 0.00 0.00 0.25 0.47 0.22 3.34 1.79 0.50 1.68 0.97 7.28 6.59 0.75 1.92 1.90 6.60 9.49 1 2.09 2.61 6.03 9.91 1.5 2.18 3.48 4.67 8.76 2 2.18 3.65 3.68 7.29 3 2.00 2.86 2.34 4.93 4 1.78 2.45 1.65 3.11 5 1.86 2.37 1.48 2.19 6 1.67 2.02 1.28 1.71 8 1.25 1.46 0.92 1.28 10 1.11 1.17 0.78 1.09 12 1.34 1.21 1.04 1.24 24 0.55 0.47 0.40 0.44 36 0.21 0.20 0.16 0.18 48 0.06 0.05 0.04 0.05 60 0.03 0.01 0.01 0.01 72 0.00 0.00 0.00 0.00 -
TABLE 23 Pharmacokinetic Parameters of Plasma Oxymorphone for Study 5Treatment Treatment Treatment Treatment 5A 5B 5C 5D Mean SD Mean SD Mean SD Mean SD Cmax 2.79 0.84 4.25 1.21 9.07 4.09 12.09 5.42 Tmax 2.26 2.52 1.96 1.06 0.69 0.43 1.19 0.62 AUC(o-t) 35.70 10.58 38.20 11.04 36.00 12.52 51.35 20.20 AUC(o-inf) 40.62 11.38 41.17 10.46 39.04 12.44 54.10 20.26 T1/2el 12.17 7.57 10.46 5.45 11.65 6.18 9.58 3.63 - The relative bioavailability calculations are summarized in Tables 24 and 25.
-
TABLE 24 Relative Bioavailability Determination Based on AUC(o-inf) Frel (5D vs. 5C) Frel (5B vs. 5A) 1.3775 1.0220 -
TABLE 25 Relative bioavailability Determination Based on AUC(o-24) Frel (5D vs. 5C) Frel (5B vs. 5A) 1.4681 1.0989 - The mean 6-OH oxymorphone plasma concentration versus time is presented in Table 26.
-
TABLE 26 Mean Plasma Concentration vs. Time (ng/ml) 6-Hydroxyoxymorphone Treatment Treatment Treatment Treatment Time (hr) 5A 5B 5C 5D 0 0.00 0.00 0.00 0.00 0.25 0.27 0.05 2.36 0.50 0.50 1.32 0.31 5.35 1.98 0.75 1.37 0.59 4.53 2.97 1 1.44 0.82 3.81 2.87 1.5 1.46 1.09 2.93 2.58 2 1.46 1.28 2.37 2.29 3 1.39 1.14 1.69 1.72 4 1.25 1.14 1.33 1.26 5 1.02 1.00 1.14 1.01 6 0.93 0.86 0.94 0.86 8 0.69 0.72 0.73 0.77 10 0.68 0.67 0.66 0.75 12 0.74 0.66 0.70 0.77 24 0.55 0.52 0.54 0.61 36 0.23 0.30 0.28 0.27 48 0.18 0.20 0.20 0.19 60 0.09 0.10 0.09 0.09 72 0.06 0.06 0.04 0.05 -
TABLE 27 Pharmacokinetic Parameters of Plasma 6-Hydroxyoxymorphone for Study 5Treatment Treatment Treatment Treatment 5A 5B 5C 5D Mean SD Mean SD Mean SD Mean SD Cmax 1.88 0.69 1.59 0.63 6.41 3.61 3.79 1.49 Tmax 1.48 1.18 2.73 1.27 0.73 0.47 1.18 0.74 AUC(o-t) 28.22 10.81 26.95 11.39 33.75 10.29 32.63 13.32 AUC(o-inf) 33.15 11.25 32.98 10.68 37.63 17.01 36.54 13.79 T1/2el 17.08 7.45 21.92 8.41 16.01 6.68 16.21 7.42 - The above description incorporates preferred embodiments and examples as a means of describing and enabling the invention to be practiced by one of skill in the art. It is imagined that changes can be made without departing from the spirit and scope of the invention described herein and defined in the appended claims.
Claims (20)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/426,112 US20090192183A1 (en) | 2001-07-06 | 2009-04-17 | Oxymorphone Controlled Release Formulations |
US13/908,328 US20140134250A1 (en) | 2001-07-06 | 2013-06-03 | Oxymorphone controlled release formulations |
US14/492,701 US20150011577A1 (en) | 2001-07-06 | 2014-09-22 | Oxymorphone controlled release formulations |
US14/798,619 US20160136152A1 (en) | 2001-07-06 | 2015-07-14 | Oxymorphone controlled release compositions |
US16/049,390 US20180338967A1 (en) | 2001-07-06 | 2018-07-30 | Oxymorphone controlled release compositions |
US17/035,453 US20210008063A1 (en) | 2001-07-06 | 2020-09-28 | Oxymorphone controlled release compositions |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US30335701P | 2001-07-06 | 2001-07-06 | |
US32944501P | 2001-10-15 | 2001-10-15 | |
US32944401P | 2001-10-15 | 2001-10-15 | |
US32943201P | 2001-10-15 | 2001-10-15 | |
US10/190,192 US9820982B2 (en) | 2001-07-06 | 2002-07-03 | Oxymorphone controlled release formulations |
US12/426,112 US20090192183A1 (en) | 2001-07-06 | 2009-04-17 | Oxymorphone Controlled Release Formulations |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/190,192 Continuation US9820982B2 (en) | 2001-07-06 | 2002-07-03 | Oxymorphone controlled release formulations |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/908,328 Continuation US20140134250A1 (en) | 2001-07-06 | 2013-06-03 | Oxymorphone controlled release formulations |
Publications (1)
Publication Number | Publication Date |
---|---|
US20090192183A1 true US20090192183A1 (en) | 2009-07-30 |
Family
ID=27501826
Family Applications (13)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/190,192 Expired - Lifetime US9820982B2 (en) | 2001-07-06 | 2002-07-03 | Oxymorphone controlled release formulations |
US10/189,653 Abandoned US20040214849A1 (en) | 2001-07-06 | 2002-07-03 | Parenteral administration of 6-hydroxy-oxymorphone for use as an analgesic |
US10/189,897 Abandoned US20030130297A1 (en) | 2001-07-06 | 2002-07-03 | Oral administration of 6-hydroxy-oxymorphone for use as an analgesic |
US11/425,966 Abandoned US20070098792A1 (en) | 2001-07-06 | 2006-06-22 | Oxymorphone controlled release formulations |
US11/426,170 Abandoned US20070098793A1 (en) | 2001-07-06 | 2006-06-23 | Oxymorphone controlled release formulations |
US11/680,432 Active 2026-03-08 US8309122B2 (en) | 2001-07-06 | 2007-02-28 | Oxymorphone controlled release formulations |
US12/167,859 Abandoned US20080262013A1 (en) | 2001-07-06 | 2008-07-03 | Oxymorphone controlled release formulations |
US12/426,112 Abandoned US20090192183A1 (en) | 2001-07-06 | 2009-04-17 | Oxymorphone Controlled Release Formulations |
US13/908,328 Abandoned US20140134250A1 (en) | 2001-07-06 | 2013-06-03 | Oxymorphone controlled release formulations |
US14/492,701 Abandoned US20150011577A1 (en) | 2001-07-06 | 2014-09-22 | Oxymorphone controlled release formulations |
US14/798,619 Abandoned US20160136152A1 (en) | 2001-07-06 | 2015-07-14 | Oxymorphone controlled release compositions |
US16/049,390 Abandoned US20180338967A1 (en) | 2001-07-06 | 2018-07-30 | Oxymorphone controlled release compositions |
US17/035,453 Abandoned US20210008063A1 (en) | 2001-07-06 | 2020-09-28 | Oxymorphone controlled release compositions |
Family Applications Before (7)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/190,192 Expired - Lifetime US9820982B2 (en) | 2001-07-06 | 2002-07-03 | Oxymorphone controlled release formulations |
US10/189,653 Abandoned US20040214849A1 (en) | 2001-07-06 | 2002-07-03 | Parenteral administration of 6-hydroxy-oxymorphone for use as an analgesic |
US10/189,897 Abandoned US20030130297A1 (en) | 2001-07-06 | 2002-07-03 | Oral administration of 6-hydroxy-oxymorphone for use as an analgesic |
US11/425,966 Abandoned US20070098792A1 (en) | 2001-07-06 | 2006-06-22 | Oxymorphone controlled release formulations |
US11/426,170 Abandoned US20070098793A1 (en) | 2001-07-06 | 2006-06-23 | Oxymorphone controlled release formulations |
US11/680,432 Active 2026-03-08 US8309122B2 (en) | 2001-07-06 | 2007-02-28 | Oxymorphone controlled release formulations |
US12/167,859 Abandoned US20080262013A1 (en) | 2001-07-06 | 2008-07-03 | Oxymorphone controlled release formulations |
Family Applications After (5)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/908,328 Abandoned US20140134250A1 (en) | 2001-07-06 | 2013-06-03 | Oxymorphone controlled release formulations |
US14/492,701 Abandoned US20150011577A1 (en) | 2001-07-06 | 2014-09-22 | Oxymorphone controlled release formulations |
US14/798,619 Abandoned US20160136152A1 (en) | 2001-07-06 | 2015-07-14 | Oxymorphone controlled release compositions |
US16/049,390 Abandoned US20180338967A1 (en) | 2001-07-06 | 2018-07-30 | Oxymorphone controlled release compositions |
US17/035,453 Abandoned US20210008063A1 (en) | 2001-07-06 | 2020-09-28 | Oxymorphone controlled release compositions |
Country Status (13)
Country | Link |
---|---|
US (13) | US9820982B2 (en) |
EP (4) | EP1414458B1 (en) |
JP (4) | JP4440635B2 (en) |
KR (1) | KR20030034171A (en) |
CN (3) | CN1610551A (en) |
AT (1) | ATE359077T1 (en) |
AU (3) | AU2002316582B2 (en) |
BR (1) | BR0205721A (en) |
CA (3) | CA2452874A1 (en) |
DE (1) | DE60219478T2 (en) |
ES (1) | ES2284888T3 (en) |
NO (1) | NO20031018L (en) |
WO (3) | WO2003004031A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009060332A1 (en) * | 2009-12-23 | 2011-06-30 | Telefónica O2 Germany GmbH & Co. OHG, 80992 | Method and device for providing a telecommunication service |
US9730885B2 (en) | 2012-07-12 | 2017-08-15 | Mallinckrodt Llc | Extended release, abuse deterrent pharmaceutical compositions |
Families Citing this family (63)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5478577A (en) * | 1993-11-23 | 1995-12-26 | Euroceltique, S.A. | Method of treating pain by administering 24 hour oral opioid formulations exhibiting rapid rate of initial rise of plasma drug level |
UA81224C2 (en) | 2001-05-02 | 2007-12-25 | Euro Celtic S A | Dosage form of oxycodone and use thereof |
US20110104214A1 (en) | 2004-04-15 | 2011-05-05 | Purdue Pharma L.P. | Once-a-day oxycodone formulations |
ATE376832T1 (en) * | 2001-07-06 | 2007-11-15 | Penwest Pharmaceuticals Co | DELAYED RELEASE FORMULATIONS OF OXYMORPHONE |
US8329216B2 (en) | 2001-07-06 | 2012-12-11 | Endo Pharmaceuticals Inc. | Oxymorphone controlled release formulations |
CN1610551A (en) * | 2001-07-06 | 2005-04-27 | 恩德制药公司 | Parenteral administration of 6-hydroxy-oxymorphone for use as an analgesic |
WO2003026743A2 (en) * | 2001-09-26 | 2003-04-03 | Penwest Pharmaceuticals Company | Opioid formulations having reduced potential for abuse |
US7776314B2 (en) | 2002-06-17 | 2010-08-17 | Grunenthal Gmbh | Abuse-proofed dosage system |
DK1551372T3 (en) | 2002-09-20 | 2018-07-23 | Alpharma Pharmaceuticals Llc | SEQUERATION SUBSTANCES AND RELATED COMPOSITIONS AND PROCEDURES |
DE10361596A1 (en) | 2003-12-24 | 2005-09-29 | Grünenthal GmbH | Process for producing an anti-abuse dosage form |
US20070048228A1 (en) | 2003-08-06 | 2007-03-01 | Elisabeth Arkenau-Maric | Abuse-proofed dosage form |
DE102005005446A1 (en) | 2005-02-04 | 2006-08-10 | Grünenthal GmbH | Break-resistant dosage forms with sustained release |
DE10336400A1 (en) | 2003-08-06 | 2005-03-24 | Grünenthal GmbH | Anti-abuse dosage form |
EP1732956A1 (en) * | 2004-03-22 | 2006-12-20 | E. I. du Pont de Nemours and Company | Orthoester-protected polyols for low voc coatings |
DE102004032049A1 (en) | 2004-07-01 | 2006-01-19 | Grünenthal GmbH | Anti-abuse, oral dosage form |
DE102005005449A1 (en) | 2005-02-04 | 2006-08-10 | Grünenthal GmbH | Process for producing an anti-abuse dosage form |
US8394812B2 (en) | 2005-08-24 | 2013-03-12 | Penwest Pharmaceuticals Co. | Sustained release formulations of nalbuphine |
US8497258B2 (en) | 2005-11-12 | 2013-07-30 | The Regents Of The University Of California | Viscous budesonide for the treatment of inflammatory diseases of the gastrointestinal tract |
US20070212414A1 (en) * | 2006-03-08 | 2007-09-13 | Penwest Pharmaceuticals Co. | Ethanol-resistant sustained release formulations |
US20080119501A1 (en) * | 2006-04-28 | 2008-05-22 | Hein William A | Immediate release oxymorphone compositions and methods of using same |
CN101677963B (en) | 2006-06-19 | 2012-05-30 | 奥尔制药公司 | Pharmaceutical compositions |
JP2010505948A (en) * | 2006-10-10 | 2010-02-25 | ペンウェスト ファーマシューティカルズ カンパニー | Robust sustained release formulation of oxymorphone and method of use thereof |
US20080085305A1 (en) * | 2006-10-10 | 2008-04-10 | Penwest Pharmaceuticals Co. | Robust sustained release formulations of oxymorphone |
US20080085303A1 (en) * | 2006-10-10 | 2008-04-10 | Penwest Pharmaceuticals Co. | Robust sustained release formulations of oxymorphone and methods of use thereof |
CN101578096A (en) * | 2006-10-10 | 2009-11-11 | 潘威斯脱药物公司 | Robust sustained release formulations |
BRPI0621952A2 (en) * | 2006-10-10 | 2011-10-18 | Penwest Pharmaceutical Co | robust formulations with prolonged release of oxymorphone and methods of using them |
GB0624880D0 (en) * | 2006-12-14 | 2007-01-24 | Johnson Matthey Plc | Improved method for making analgesics |
DE102007011485A1 (en) * | 2007-03-07 | 2008-09-11 | Grünenthal GmbH | Dosage form with more difficult abuse |
US20080318994A1 (en) | 2007-06-21 | 2008-12-25 | Endo Pharmaceuticals, Inc. | Method of Treating Pain Utilizing Controlled Release Oxymorphone Pharmaceutical Compositions and Instruction on Dosing for Renal Impairment |
US20080318993A1 (en) * | 2007-06-21 | 2008-12-25 | Endo Pharmaceuticals, Inc. | Method of Treating Pain Utilizing Controlled Release Oxymorphone Pharmaceutical Compositions and Instruction on Dosing for Hepatic Impairment |
US20090124650A1 (en) * | 2007-06-21 | 2009-05-14 | Endo Pharmaceuticals, Inc. | Method of Treating Pain Utilizing Controlled Release Oxymorphone Pharmaceutical Compositions and Instructions on Effects of Alcohol |
ES2692437T3 (en) | 2007-08-13 | 2018-12-03 | Abuse Deterrent Pharmaceutical Llc | Abuse-resistant drugs, method of use and method of preparation |
US8623418B2 (en) | 2007-12-17 | 2014-01-07 | Alpharma Pharmaceuticals Llc | Pharmaceutical composition |
AU2009207796B2 (en) | 2008-01-25 | 2014-03-27 | Grunenthal Gmbh | Pharmaceutical dosage form |
ES2599031T3 (en) | 2008-05-09 | 2017-01-31 | Grünenthal GmbH | Process for the preparation of an intermediate powder formulation and a final solid dosage form using a spray freezing step |
WO2010099508A1 (en) * | 2009-02-26 | 2010-09-02 | Theraquest Biosciences, Inc. | Extended release oral pharmaceutical compositions of 3-hydroxy-n-methylmorphinan and method of use |
US20110097401A1 (en) | 2009-06-12 | 2011-04-28 | Meritage Pharma, Inc. | Methods for treating gastrointestinal disorders |
PT2456424E (en) | 2009-07-22 | 2013-09-30 | Gruenenthal Gmbh | Oxidation-stabilized tamper-resistant dosage form |
NZ596667A (en) * | 2009-07-22 | 2013-09-27 | Gruenenthal Chemie | Hot-melt extruded controlled release dosage form |
CA2808541C (en) | 2010-09-02 | 2019-01-08 | Gruenenthal Gmbh | Tamper resistant dosage form comprising an anionic polymer |
MX2013002377A (en) | 2010-09-02 | 2013-04-29 | Gruenenthal Gmbh | Tamper resistant dosage form comprising inorganic salt. |
MX348054B (en) | 2011-07-29 | 2017-05-25 | Gruenenthal Gmbh | Tamper-resistant tablet providing immediate drug release. |
AR087360A1 (en) | 2011-07-29 | 2014-03-19 | Gruenenthal Gmbh | PROOF OF HANDLING TABLET PROVIDING IMMEDIATE RELEASE OF PHARMACY |
AU2013225106B2 (en) | 2012-02-28 | 2017-11-02 | Grunenthal Gmbh | Tamper-resistant dosage form comprising pharmacologically active compound and anionic polymer |
RS57913B1 (en) | 2012-04-18 | 2019-01-31 | Gruenenthal Gmbh | Tamper resistant and dose-dumping resistant pharmaceutical dosage form |
US10064945B2 (en) | 2012-05-11 | 2018-09-04 | Gruenenthal Gmbh | Thermoformed, tamper-resistant pharmaceutical dosage form containing zinc |
WO2014146093A2 (en) | 2013-03-15 | 2014-09-18 | Inspirion Delivery Technologies, Llc | Abuse deterrent compositions and methods of use |
JP6466417B2 (en) | 2013-05-29 | 2019-02-06 | グリュネンタール・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | A tamper-resistant dosage form with a bimodal release profile |
JP6445537B2 (en) | 2013-05-29 | 2018-12-26 | グリュネンタール・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Tamper-resistant dosage forms containing one or more particles |
JP6449871B2 (en) | 2013-07-12 | 2019-01-09 | グリュネンタール・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Anti-modified dosage form containing ethylene-vinyl acetate polymer |
EP3027622B8 (en) | 2013-08-02 | 2019-06-12 | Johnson Matthey Public Limited Company | Process for the preparation of oxymorphone |
BR112016010482B1 (en) | 2013-11-26 | 2022-11-16 | Grünenthal GmbH | PREPARATION OF A PHARMACEUTICAL COMPOSITION IN POWDER BY MEANS OF CRYOMING |
US9062063B1 (en) | 2014-03-21 | 2015-06-23 | Johnson Matthey Public Limited Company | Forms of oxymorphone hydrochloride |
WO2015173195A1 (en) | 2014-05-12 | 2015-11-19 | Grünenthal GmbH | Tamper resistant immediate release capsule formulation comprising tapentadol |
JP2017516789A (en) | 2014-05-26 | 2017-06-22 | グリュネンタール・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Multiparticulates protected against ethanol overdose |
US10729685B2 (en) | 2014-09-15 | 2020-08-04 | Ohemo Life Sciences Inc. | Orally administrable compositions and methods of deterring abuse by intranasal administration |
US9918979B2 (en) | 2015-01-29 | 2018-03-20 | Johnson Matthey Public Limited Company | Process of preparing low ABUK oxymorphone hydrochloride |
EA035434B1 (en) | 2015-04-24 | 2020-06-15 | Грюненталь Гмбх | Tamper-resistant dosage form with immediate release and resistance against solvent extraction |
US10842750B2 (en) | 2015-09-10 | 2020-11-24 | Grünenthal GmbH | Protecting oral overdose with abuse deterrent immediate release formulations |
US9943513B1 (en) | 2015-10-07 | 2018-04-17 | Banner Life Sciences Llc | Opioid abuse deterrent dosage forms |
US10335405B1 (en) | 2016-05-04 | 2019-07-02 | Patheon Softgels, Inc. | Non-burst releasing pharmaceutical composition |
US10335375B2 (en) | 2017-05-30 | 2019-07-02 | Patheon Softgels, Inc. | Anti-overingestion abuse deterrent compositions |
PT3431078T (en) * | 2017-07-20 | 2021-04-21 | Intas Pharmaceuticals Ltd | Non-pulsatile prolonged-release betahistine oral solid compositions |
Citations (91)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US458349A (en) * | 1891-08-25 | Hose-coupling | ||
US591431A (en) * | 1897-10-12 | Coupling for traps and pipes | ||
US2806033A (en) * | 1955-08-03 | 1957-09-10 | Lewenstein | Morphine derivative |
US3393197A (en) * | 1966-01-19 | 1968-07-16 | Endo Lab | Nu-substituted-14-hydroxydihydronormorphines |
US3400197A (en) * | 1965-01-26 | 1968-09-03 | Robins Co Inc A H | Compressible sustained release pharmaceutical tablet lipid-colloidal silica gel matrix fragment granules |
US3456049A (en) * | 1965-05-25 | 1969-07-15 | Ciba Geigy Corp | Gradual-release tablet |
US3558768A (en) * | 1969-12-19 | 1971-01-26 | Sterling Drug Inc | Sustained release pharmaceutical compositions |
US3845770A (en) * | 1972-06-05 | 1974-11-05 | Alza Corp | Osmatic dispensing device for releasing beneficial agent |
US4140755A (en) * | 1976-02-13 | 1979-02-20 | Hoffmann-La Roche Inc. | Sustained release tablet formulations |
US4177782A (en) * | 1976-11-01 | 1979-12-11 | Hitachi, Ltd. | Ignition system providing sparks for two ignition plugs in each cylinder from a single ignition coil |
US4248858A (en) * | 1979-08-09 | 1981-02-03 | American Home Products Corporation | Sustained release pharmaceutical compositions |
US4252786A (en) * | 1979-11-16 | 1981-02-24 | E. R. Squibb & Sons, Inc. | Controlled release tablet |
US4309405A (en) * | 1979-08-09 | 1982-01-05 | American Home Products Corporation | Sustained release pharmaceutical compositions |
US4366159A (en) * | 1981-09-08 | 1982-12-28 | Michael Richard Magruder | Nalbuphine-narcotic analgesic composition and method of producing analgesia |
US4415547A (en) * | 1982-06-14 | 1983-11-15 | Sterling Drug Inc. | Sustained-release pharmaceutical tablet and process for preparation thereof |
US4461759A (en) * | 1983-01-03 | 1984-07-24 | Verex Laboratories, Inc. | Constant release rate solid oral dosage formulations of veropamil |
US4521401A (en) * | 1983-01-03 | 1985-06-04 | Verex Laboratories, Inc. | Constant release rate solid oral dosage formulations of quinidine |
US4521402A (en) * | 1983-01-03 | 1985-06-04 | Verex Laboratories, Inc. | Constant release rate solid oral dosage formulations of hydrazine |
US4522804A (en) * | 1983-01-03 | 1985-06-11 | Verex Laboratories, Inc. | Constant release rate solid oral dosage formulations of propranolol |
US4599114A (en) * | 1985-02-11 | 1986-07-08 | Atkinson George K | Treatment of titanium dioxide and other pigments to improve dispersibility |
US4610870A (en) * | 1984-10-05 | 1986-09-09 | E. R. Squibb & Sons, Inc. | Controlled release formulation |
US4656177A (en) * | 1982-07-22 | 1987-04-07 | Analgesic Associates | Analgesic and anti-inflammatory compositions comprising caffeine and methods of using same |
US4661492A (en) * | 1984-11-30 | 1987-04-28 | Reckitt & Colman Products Limited | Analgesic compositions |
US4695467A (en) * | 1984-07-12 | 1987-09-22 | Fujisawa Pharmaceutical Co., Ltd. | Sustained release tablet |
US4711782A (en) * | 1983-11-04 | 1987-12-08 | Takeda Chemical Industries, Ltd. | Prolonged release microcapsules and their production |
US4777174A (en) * | 1982-07-22 | 1988-10-11 | Analgesic Associates | Analgesic and anti-inflammatory compositions comprising caffeine and methods of using same |
US4792452A (en) * | 1987-07-28 | 1988-12-20 | E. R. Squibb & Sons, Inc. | Controlled release formulation |
US4803081A (en) * | 1986-04-11 | 1989-02-07 | Aktiebolaget Hassle | New pharmaceutical preparations with extended release |
US4844909A (en) * | 1986-10-31 | 1989-07-04 | Euroceltique, S.A. | Controlled release hydromorphone composition |
US4844907A (en) * | 1985-08-28 | 1989-07-04 | Euroceltique, S.A. | Pharmaceutical composition comprising analgesic and anti-inflammatory agent |
US4861598A (en) * | 1986-07-18 | 1989-08-29 | Euroceltique, S.A. | Controlled release bases for pharmaceuticals |
US4867985A (en) * | 1987-03-04 | 1989-09-19 | Euroceltique S.A. | Spheroids |
US4935428A (en) * | 1987-12-03 | 1990-06-19 | Reckitt & Colman Products Limited | Treating opiate dependence |
US4940587A (en) * | 1985-06-11 | 1990-07-10 | Euroceltique, S.A. | Oral pharmaceutical composition through mucosa |
US4942040A (en) * | 1987-10-08 | 1990-07-17 | Aktiebolaget Hassle | Pharmaceutical preparation and a process for its preparation |
US4968508A (en) * | 1987-02-27 | 1990-11-06 | Eli Lilly And Company | Sustained release matrix |
US4973469A (en) * | 1986-02-03 | 1990-11-27 | Elan Corporation, Plc | Drug delivery system |
US4980170A (en) * | 1988-06-30 | 1990-12-25 | Klinge Pharma Gmbh | Pharmaceutical formulation as well as a process for its preparation |
US4994276A (en) * | 1988-09-19 | 1991-02-19 | Edward Mendell Co., Inc. | Directly compressible sustained release excipient |
US5004614A (en) * | 1988-08-26 | 1991-04-02 | Forum Chemicals Ltd. | Controlled release device with an impermeable coating having an orifice for release of drug |
US5047248A (en) * | 1986-03-07 | 1991-09-10 | Eurand Italia S.P.A. | Formulation for preparing sustained release drugs for oral administration |
US5051263A (en) * | 1987-10-12 | 1991-09-24 | Barry Brian W | Controlled-release formulations |
US5096714A (en) * | 1988-06-28 | 1992-03-17 | Hauser-Kuhrts, Inc. | Prolonged release drug tablet formulations |
US5100675A (en) * | 1989-05-03 | 1992-03-31 | Schering Corporation | Sustained release tablet comprising loratadine, ibuprofen and pseudoephedrine |
US5126145A (en) * | 1989-04-13 | 1992-06-30 | Upsher Smith Laboratories Inc | Controlled release tablet containing water soluble medicament |
US5126147A (en) * | 1990-02-08 | 1992-06-30 | Biosearch, Inc. | Sustained release dosage form |
US5128143A (en) * | 1988-09-19 | 1992-07-07 | Edward Mendell Co., Inc. | Sustained release excipient and tablet formulation |
US5132116A (en) * | 1987-07-16 | 1992-07-21 | Pierre Fabre Medicament | Tablets of the hydrophilic matrix type based on salbutamol and a process for their preparation |
US5135757A (en) * | 1988-09-19 | 1992-08-04 | Edward Mendell Co., Inc. | Compressible sustained release solid dosage forms |
US5145683A (en) * | 1989-02-14 | 1992-09-08 | Ethical Pharmaceuticals, Ltd. | Nifedipine-containing pharmaceutical compositions and process for the preparation thereof |
US5164193A (en) * | 1990-07-25 | 1992-11-17 | Ss Pharmaceutical Co., Ltd. | Sustained-release tablet |
US5169638A (en) * | 1991-10-23 | 1992-12-08 | E. R. Squibb & Sons, Inc. | Buoyant controlled release powder formulation |
US5202128A (en) * | 1989-01-06 | 1993-04-13 | F. H. Faulding & Co. Limited | Sustained release pharmaceutical composition |
US5236714A (en) * | 1988-11-01 | 1993-08-17 | Alza Corporation | Abusable substance dosage form having reduced abuse potential |
US5266331A (en) * | 1991-11-27 | 1993-11-30 | Euroceltique, S.A. | Controlled release oxycodone compositions |
US5330761A (en) * | 1993-01-29 | 1994-07-19 | Edward Mendell Co. Inc. | Bioadhesive tablet for non-systemic use products |
US5399362A (en) * | 1994-04-25 | 1995-03-21 | Edward Mendell Co., Inc. | Once-a-day metoprolol oral dosage form |
US5399358A (en) * | 1993-11-12 | 1995-03-21 | Edward Mendell Co., Inc. | Sustained release formulations for 24 hour release of metroprolol |
US5399359A (en) * | 1994-03-04 | 1995-03-21 | Edward Mendell Co., Inc. | Controlled release oxybutynin formulations |
US5415871A (en) * | 1986-01-18 | 1995-05-16 | The Boots Company Plc | Therapeutic agents |
US5431922A (en) * | 1991-03-05 | 1995-07-11 | Bristol-Myers Squibb Company | Method for administration of buspirone |
US5455046A (en) * | 1993-09-09 | 1995-10-03 | Edward Mendell Co., Inc. | Sustained release heterodisperse hydrogel systems for insoluble drugs |
US5470584A (en) * | 1991-05-20 | 1995-11-28 | Carderm Capital L.P. | Diltiazem formulation |
US5512578A (en) * | 1992-09-21 | 1996-04-30 | Albert Einstein College Of Medicine Of Yeshiva University, A Division Of Yeshiva University | Method of simultaneously enhancing analgesic potency and attenuating dependence liability caused by exogenous and endogenous opiod agonists |
US5567754A (en) * | 1995-08-23 | 1996-10-22 | Kerr-Mcgee Corporation | Pigments with improved dispersibility in thermoplastic resins |
US5612053A (en) * | 1995-04-07 | 1997-03-18 | Edward Mendell Co., Inc. | Controlled release insufflation carrier for medicaments |
US5629011A (en) * | 1992-02-05 | 1997-05-13 | Danbiosyst Uk Limited | Composition for nasal administration |
US5633000A (en) * | 1994-06-23 | 1997-05-27 | Axxia Technologies | Subcutaneous implant |
US5639476A (en) * | 1992-01-27 | 1997-06-17 | Euro-Celtique, S.A. | Controlled release formulations coated with aqueous dispersions of acrylic polymers |
US5662933A (en) * | 1993-09-09 | 1997-09-02 | Edward Mendell Co., Inc. | Controlled release formulation (albuterol) |
US5672360A (en) * | 1993-11-23 | 1997-09-30 | Purdue Pharma, L.P. | Method of treating pain by administering 24 hour oral opioid formulations |
US5891474A (en) * | 1997-01-29 | 1999-04-06 | Poli Industria Chimica, S.P.A. | Time-specific controlled release dosage formulations and method of preparing same |
US5948438A (en) * | 1995-01-09 | 1999-09-07 | Edward Mendell Co., Inc. | Pharmaceutical formulations having improved disintegration and/or absorptivity |
US5958458A (en) * | 1994-06-15 | 1999-09-28 | Dumex-Alpharma A/S | Pharmaceutical multiple unit particulate formulation in the form of coated cores |
US5965161A (en) * | 1994-11-04 | 1999-10-12 | Euro-Celtique, S.A. | Extruded multi-particulates |
US6093420A (en) * | 1996-07-08 | 2000-07-25 | Edward Mendell Co., Inc. | Sustained release matrix for high-dose insoluble drugs |
US6102358A (en) * | 1997-11-03 | 2000-08-15 | Mcleary; Joseph Butler | Counterpoise and mounting clamp for a musical drum |
US6103261A (en) * | 1993-07-01 | 2000-08-15 | Purdue Pharma Lp | Opioid formulations having extended controlled release |
US6228398B1 (en) * | 1998-11-02 | 2001-05-08 | Elan Corporation, Plc | Multiparticulate modified release composition |
US6245351B1 (en) * | 1996-03-07 | 2001-06-12 | Takeda Chemical Industries, Ltd. | Controlled-release composition |
US6248789B1 (en) * | 1996-08-29 | 2001-06-19 | Stuart L. Weg | Administration of ketamine to manage pain and to reduce drug dependency |
US6294195B1 (en) * | 1991-12-24 | 2001-09-25 | Purdue Pharma L.P. | Orally administrable opioid formulations having extended duration of effect |
US6296842B1 (en) * | 2000-08-10 | 2001-10-02 | Alkermes Controlled Therapeutics, Inc. | Process for the preparation of polymer-based sustained release compositions |
US6306425B1 (en) * | 1999-04-09 | 2001-10-23 | Southern Research Institute | Injectable naltrexone microsphere compositions and their use in reducing consumption of heroin and alcohol |
US6309668B1 (en) * | 1994-02-01 | 2001-10-30 | Aventis Pharma Limited | Abuse resistant tablets |
US6316031B1 (en) * | 1991-12-24 | 2001-11-13 | Purdue Pharma Lp | Stabilized controlled release substrate having a coating derived from an aqueous dispersion of hydrophobic polymer |
US6340475B2 (en) * | 1997-06-06 | 2002-01-22 | Depomed, Inc. | Extending the duration of drug release within the stomach during the fed mode |
US20020044966A1 (en) * | 1999-01-18 | 2002-04-18 | Johannes Bartholomaeus | Pharmaceutical formulations containing an opioid and an alpha-agonist |
US6413494B1 (en) * | 1998-07-23 | 2002-07-02 | Samyang Corporation | Composition and pharmaceutical dosage form for colonic drug delivery using polysaccharides |
US20030044458A1 (en) * | 2001-08-06 | 2003-03-06 | Curtis Wright | Oral dosage form comprising a therapeutic agent and an adverse-effect agent |
US20030091635A1 (en) * | 2001-09-26 | 2003-05-15 | Baichwal Anand R. | Opioid formulations having reduced potential for abuse |
Family Cites Families (126)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1517480A1 (en) | 1962-11-16 | 1969-05-22 | Permutit Co Ltd | Device for the regeneration of ion exchangers, especially for water dehydration |
US3879555A (en) * | 1970-11-16 | 1975-04-22 | Bristol Myers Co | Method of treating drug addicts |
US3980766A (en) * | 1973-08-13 | 1976-09-14 | West Laboratories, Inc. | Orally administered drug composition for therapy in the treatment of narcotic drug addiction |
US3966940A (en) * | 1973-11-09 | 1976-06-29 | Bristol-Myers Company | Analgetic compositions |
DE2530563C2 (en) | 1975-07-09 | 1986-07-24 | Bayer Ag, 5090 Leverkusen | Analgesic drugs with reduced potential for abuse |
US4303691A (en) * | 1977-11-09 | 1981-12-01 | Anderson, Clayton & Co. | Proteinaceous food product |
NO793297L (en) | 1978-10-19 | 1980-04-22 | Mallinckrodt Inc | PROCEDURE FOR THE MANUFACTURE OF OXYMORPHONE |
US4457933A (en) * | 1980-01-24 | 1984-07-03 | Bristol-Myers Company | Prevention of analgesic abuse |
US4489080A (en) * | 1981-06-26 | 1984-12-18 | The Upjohn Company | Process for analgesic treatment |
US4464376A (en) * | 1982-07-22 | 1984-08-07 | Richardson-Vicks, Inc. | Analgesic and anti-inflammatory compositions comprising caffeine and methods of using same |
US4486436A (en) | 1982-07-22 | 1984-12-04 | Analgesic Associates | Analgesic and anti-inflammatory compositions comprising caffeine and methods of using same |
GB2134786B (en) | 1982-07-22 | 1986-05-08 | Richardson Vicks Inc | Improved analgesic and anti-inflammatory compositions comprising caffeine and methods of using same |
US4587249A (en) * | 1982-07-22 | 1986-05-06 | Analgesic Associates | Analgesic and anti-inflammatory compositions comprising caffeine and methods of using same |
US4567183A (en) | 1983-03-11 | 1986-01-28 | Analgesic Associates | Analgesic and anti-inflammatory compositions comprising xanthines and methods of using same |
US4479956A (en) | 1983-04-26 | 1984-10-30 | Analgeic Associates | Analgesic compositions comprising propiram and methods of using same |
US4558051A (en) | 1983-10-11 | 1985-12-10 | Richardson-Vicks, Inc. | Analgesic and anti-inflammatory compositions comprising xanthines and methods of using same |
GB8332556D0 (en) * | 1983-12-06 | 1984-01-11 | Reckitt & Colmann Prod Ltd | Analgesic compositions |
US4569937A (en) * | 1985-02-11 | 1986-02-11 | E. I. Du Pont De Nemours And Company | Analgesic mixture of oxycodone and ibuprofen |
GB2176999B (en) | 1985-06-22 | 1989-07-12 | Stanley Stewart Davis | Sustained release medicament |
US4795642A (en) * | 1986-05-01 | 1989-01-03 | Pharmacaps, Inc. | Gelatin-encapsulated controlled-release composition |
US4859461A (en) * | 1986-07-30 | 1989-08-22 | Fisons Corporation | Coatable ion exchange resins |
US5169639A (en) | 1988-09-19 | 1992-12-08 | Edward Mendell Co., Inc. | Controlled release verapamil tablets |
GB8926612D0 (en) | 1989-11-24 | 1990-01-17 | Erba Farmitalia | Pharmaceutical compositions |
SE9003903D0 (en) * | 1990-12-07 | 1990-12-07 | Astra Ab | NEW PHARMACEUTICAL FORMULATIONS |
US5215758A (en) * | 1991-09-11 | 1993-06-01 | Euroceltique, S.A. | Controlled release matrix suppository for pharmaceuticals |
US5226331A (en) * | 1991-10-03 | 1993-07-13 | General Electric Company | Apparatus and method for measuring the particle number rate and the velocity distribution of a sprayed stream |
US5958459A (en) | 1991-12-24 | 1999-09-28 | Purdue Pharma L.P. | Opioid formulations having extended controlled released |
WO1993017673A1 (en) | 1992-03-03 | 1993-09-16 | Top Gold Pty., Limited | Sustained release analgesics |
DE4227385A1 (en) * | 1992-08-19 | 1994-02-24 | Kali Chemie Pharma Gmbh | Pancreatin micropellets |
USRE36547E (en) | 1992-09-21 | 2000-02-01 | Albert Einstein College Of Medicine Of Yeshiva University | Method of simultaneously enhancing analgesic potency and attenuating dependence liability caused by exogenous and endogenous opioid agonists |
US5773025A (en) | 1993-09-09 | 1998-06-30 | Edward Mendell Co., Inc. | Sustained release heterodisperse hydrogel systems--amorphous drugs |
KR100354702B1 (en) | 1993-11-23 | 2002-12-28 | 유로-셀티크 소시에떼 아노뉨 | Manufacturing method and sustained release composition of pharmaceutical composition |
US5543434A (en) * | 1994-02-25 | 1996-08-06 | Weg; Stuart L. | Nasal administration of ketamine to manage pain |
CA2164513C (en) | 1994-04-25 | 1999-09-21 | Anand R. Baichwal | Sustained release excipient |
US5914131A (en) | 1994-07-07 | 1999-06-22 | Alza Corporation | Hydromorphone therapy |
US5556837A (en) * | 1994-08-01 | 1996-09-17 | Regeneron Pharmaceuticals Inc. | Methods for treating addictive disorders |
GB9426407D0 (en) | 1994-12-30 | 1995-03-01 | Sandoz Ltd | Improvements in or relating to organic compounds |
FR2729857B1 (en) * | 1995-01-27 | 1997-04-04 | Rhone Poulenc Chimie | PHARMACEUTICAL COMPOSITIONS IN THE FORM OF SUSTAINED-RELEASE TABLETS BASED ON GRANULES OF HIGH MOLECULAR POLYSACCHARIDES |
US5686107A (en) * | 1995-01-30 | 1997-11-11 | Fmc Corporation | Chewable pharmaceutical tablets |
WO1997007750A1 (en) | 1995-08-30 | 1997-03-06 | Weg Stuart L | Administration of ketamine to manage pain and to reduce drug dependency |
AU2068797A (en) * | 1996-01-29 | 1997-08-20 | Edward Mendell Co. Inc. | Sustained release excipient |
JP3134187B2 (en) | 1996-03-07 | 2001-02-13 | 武田薬品工業株式会社 | Controlled release composition |
US6103258A (en) * | 1996-04-12 | 2000-08-15 | Simon; David Lew | Salts and bases of the 17-(Cyclopropylmethyl)-4,5 alpha-epoxy-6-Methylenemorphinan-3,14 diol molecule for optimizing dopamine homeostasis during administration of opioid analgesics |
CA2461157C (en) | 1996-04-18 | 2007-08-28 | Penwest Pharmaceutical Co. | Sustained release heterodisperse hydrogel systems - amorphous drugs |
AU3581397A (en) | 1996-06-28 | 1998-01-21 | Knoll Pharmaceutical Company | Slow release pharmaceutical compositions and methods of making same |
DE19710008A1 (en) | 1997-03-12 | 1998-09-17 | Basf Ag | Solid, at least two-phase formulations of a sustained-release opioid analgesic |
AU8293498A (en) | 1997-07-02 | 1999-01-25 | Euro-Celtique S.A. | Stabilized sustained release tramadol formulations |
US6391336B1 (en) * | 1997-09-22 | 2002-05-21 | Royer Biomedical, Inc. | Inorganic-polymer complexes for the controlled release of compounds including medicinals |
US5904937A (en) | 1997-10-03 | 1999-05-18 | Fmc Corporation | Taste masked pharmaceutical compositions |
WO1999017763A1 (en) | 1997-10-03 | 1999-04-15 | The Governors Of The University Of Alberta | Postsurgical treatment with dichloroacetate |
US6056977A (en) | 1997-10-15 | 2000-05-02 | Edward Mendell Co., Inc. | Once-a-day controlled release sulfonylurea formulation |
US6193991B1 (en) * | 1997-10-29 | 2001-02-27 | Atul J. Shukla | Biodegradable delivery systems of biologically active substances |
UA53774C2 (en) | 1997-12-22 | 2003-02-17 | Еро-Селтік, С.А. | Method of reducing abuse potential of an oral dosage form of opioid analgesic |
WO1999032119A1 (en) * | 1997-12-22 | 1999-07-01 | Euro-Celtique, S.A. | Opioid agonist/antagonist combinations |
US6375957B1 (en) * | 1997-12-22 | 2002-04-23 | Euro-Celtique, S.A. | Opioid agonist/opioid antagonist/acetaminophen combinations |
US6245357B1 (en) * | 1998-03-06 | 2001-06-12 | Alza Corporation | Extended release dosage form |
US6143325A (en) | 1998-06-05 | 2000-11-07 | Bristol-Myers Squibb Company | Nefazodone dosage form |
GB9816723D0 (en) | 1998-08-01 | 1998-09-30 | Boots Co Plc | Therapeutic agents |
DE29818454U1 (en) | 1998-10-15 | 1999-01-14 | Euro Celtique Sa | Opioid analgesic |
US6806294B2 (en) * | 1998-10-15 | 2004-10-19 | Euro-Celtique S.A. | Opioid analgesic |
US6242001B1 (en) * | 1998-11-30 | 2001-06-05 | Mcneil-Ppc, Inc. | Method for producing dispersible sterol and stanol compounds |
EP1005863A1 (en) | 1998-12-04 | 2000-06-07 | Synthelabo | Controlled-release dosage forms comprising a short acting hypnotic or a salt thereof |
FR2787715B1 (en) | 1998-12-23 | 2002-05-10 | Synthelabo | PHARMACEUTICAL COMPOSITION COMPRISING A HYPNOTIC COMPOUND OR ONE OF ITS PHARMACEUTICALLY ACCEPTABLE SALTS |
US6166211A (en) * | 1999-03-19 | 2000-12-26 | Endo Pharmaceuticals, Inc. | Sequential benzylic oxidations of the naloxone ring system |
US20030170181A1 (en) | 1999-04-06 | 2003-09-11 | Midha Kamal K. | Method for preventing abuse of methylphenidate |
CO5170471A1 (en) | 1999-04-13 | 2002-06-27 | Beecham Pharmaceutical Pte Ltd | MODIFIED RELEASE TABLETS INCLUDING AMOXYLIN AND POTASSIUM CLAVULANATE |
EP1064937A1 (en) | 1999-06-28 | 2001-01-03 | Sanofi-Synthelabo | Timed dual release dosage forms comprising a short acting hypnotic or a salt thereof |
EP1204406A2 (en) * | 1999-07-29 | 2002-05-15 | Roxane Laboratories, Inc. | Opioid sustained-released formulation |
US20030118641A1 (en) * | 2000-07-27 | 2003-06-26 | Roxane Laboratories, Inc. | Abuse-resistant sustained-release opioid formulation |
KR100345214B1 (en) | 1999-08-17 | 2002-07-25 | 이강춘 | The nasal transmucosal delivery of peptides conjugated with biocompatible polymers |
CN100387228C (en) * | 1999-08-27 | 2008-05-14 | 布鲁克伍德药品公司 | Injectable buprenorphine microparticle compositions and their use |
US6436977B1 (en) | 1999-09-29 | 2002-08-20 | Pfizer Inc. | Dosing regimens for lasofoxifene |
DE60038536T2 (en) | 1999-09-30 | 2009-06-10 | Penwest Pharmaceuticals Co. | MATRIX SYSTEM WITH DELAYED RELEASE FOR HIGHLY SOLUBLE ACTIVE SUBSTANCES |
NZ529928A (en) | 1999-10-29 | 2005-10-28 | Euro Celtique Sa | Controlled release hydrocodone formulations |
DE60038698T2 (en) | 1999-12-23 | 2009-05-07 | Pfizer Products Inc., Groton | HYDROGEL-CONTROLLED DOSAGE FORM |
ES2258072T3 (en) * | 2000-01-19 | 2006-08-16 | Mannkind Corporation | PREPARATION OF RELEASE IN VARIOUS STAGES FOR THE ADMINISTRATION OF MEDICINES. |
HU229705B1 (en) * | 2000-02-08 | 2014-05-28 | Euro Celtique Sa | Tamper-resistant oral opioid agonist formulations |
US6716449B2 (en) * | 2000-02-08 | 2004-04-06 | Euro-Celtique S.A. | Controlled-release compositions containing opioid agonist and antagonist |
CA2386794A1 (en) | 2000-07-13 | 2002-01-24 | Euro-Celtique, S.A. | Salts and bases of 17-(cyclopropylmethyl)-4,5 alpha-epoxy-6-methylenemorphinan-3,14 diol for optimizing dopamine homeostasis during administration of opioid analgesics |
US20020038310A1 (en) * | 2000-07-17 | 2002-03-28 | Reitberg Donald P. | Single-patient drug trials used with accumulated database: genomic markers |
JP2004505730A (en) | 2000-08-15 | 2004-02-26 | ユニバーシティ オブ ケンタッキー リサーチ ファウンデーション | Programmable multi-dose intranasal drug delivery device |
IL155102A0 (en) | 2000-10-03 | 2003-10-31 | Penwest Pharmaceuticals Co | Delivery system for multi-pharmaceutical active materials at various release rates |
US20020187192A1 (en) | 2001-04-30 | 2002-12-12 | Yatindra Joshi | Pharmaceutical composition which reduces or eliminates drug abuse potential |
ATE493130T1 (en) * | 2001-05-11 | 2011-01-15 | Endo Pharmaceuticals Inc | MEDICINAL FORM CONTAINING OPIOID AGAINST ABUSE |
ES2275868T3 (en) | 2001-05-11 | 2007-06-16 | Endo Pharmaceuticals Inc. | OPIOID DOSAGE FORM TO PREVENT ABUSIVE CONSUMPTION. |
AU2002339378A1 (en) | 2001-05-22 | 2002-12-03 | Euro-Celtique | Compartmentalized dosage form |
US20030064122A1 (en) | 2001-05-23 | 2003-04-03 | Endo Pharmaceuticals, Inc. | Abuse resistant pharmaceutical composition containing capsaicin |
US8329216B2 (en) * | 2001-07-06 | 2012-12-11 | Endo Pharmaceuticals Inc. | Oxymorphone controlled release formulations |
CN1610551A (en) | 2001-07-06 | 2005-04-27 | 恩德制药公司 | Parenteral administration of 6-hydroxy-oxymorphone for use as an analgesic |
ATE376832T1 (en) | 2001-07-06 | 2007-11-15 | Penwest Pharmaceuticals Co | DELAYED RELEASE FORMULATIONS OF OXYMORPHONE |
DE60230632D1 (en) | 2001-07-18 | 2009-02-12 | Euro Celtique Sa | PHARMACEUTICAL COMBINATIONS OF OXYCODONE AND NALOXONE |
US7157103B2 (en) * | 2001-08-06 | 2007-01-02 | Euro-Celtique S.A. | Pharmaceutical formulation containing irritant |
WO2003013433A2 (en) | 2001-08-06 | 2003-02-20 | Euro-Celtique S.A. | Sequestered antagonist formulations |
MXPA04001206A (en) | 2001-08-06 | 2004-07-08 | Euro Celtique Sa | Compositions and methods to prevent abuse of opioids. |
ATE431738T1 (en) | 2001-08-06 | 2009-06-15 | Euro Celtique Sa | OPIOID AGONIST FORMULATIONS WITH RELEASABLE AND SEQUESTRED ANTAGONIST |
US7141250B2 (en) * | 2001-08-06 | 2006-11-28 | Euro-Celtique S.A. | Pharmaceutical formulation containing bittering agent |
US7144587B2 (en) * | 2001-08-06 | 2006-12-05 | Euro-Celtique S.A. | Pharmaceutical formulation containing opioid agonist, opioid antagonist and bittering agent |
US20030068375A1 (en) * | 2001-08-06 | 2003-04-10 | Curtis Wright | Pharmaceutical formulation containing gelling agent |
US7842307B2 (en) * | 2001-08-06 | 2010-11-30 | Purdue Pharma L.P. | Pharmaceutical formulation containing opioid agonist, opioid antagonist and gelling agent |
WO2003015531A2 (en) | 2001-08-06 | 2003-02-27 | Thomas Gruber | Pharmaceutical formulation containing dye |
US7332182B2 (en) * | 2001-08-06 | 2008-02-19 | Purdue Pharma L.P. | Pharmaceutical formulation containing opioid agonist, opioid antagonist and irritant |
KR20040060917A (en) | 2001-08-06 | 2004-07-06 | 유로-셀티크 소시에떼 아노뉨 | Compositions and methods to prevent abuse of opioids |
US20030049272A1 (en) * | 2001-08-30 | 2003-03-13 | Yatindra Joshi | Pharmaceutical composition which produces irritation |
US20030059397A1 (en) * | 2001-09-17 | 2003-03-27 | Lyn Hughes | Dosage forms |
US20030068276A1 (en) | 2001-09-17 | 2003-04-10 | Lyn Hughes | Dosage forms |
EP1450824A4 (en) * | 2001-11-02 | 2005-09-28 | Elan Corp Plc | Pharmaceutical composition |
US20030158264A1 (en) | 2002-02-20 | 2003-08-21 | Ramachandran Radhakrishnan | Orally administrable pharmaceutical formulation comprising ephedrine hydrochloride and process for preparing the same |
WO2003072106A2 (en) | 2002-02-27 | 2003-09-04 | Ab Science | Use of tyrosine kinase inhibitors for treating substance use disorders |
ES2327034T3 (en) | 2002-03-26 | 2009-10-23 | Euro-Celtique S.A. | COMPOSITIONS COVERED WITH SUSTAINED RELEASE GEL. |
US7524515B2 (en) * | 2003-01-10 | 2009-04-28 | Mutual Pharmaceuticals, Inc. | Pharmaceutical safety dosage forms |
JP2008520744A (en) * | 2004-11-19 | 2008-06-19 | ザ・レジェンツ・オブ・ザ・ユニバーシティ・オブ・カリフォルニア | Anti-inflammatory pyrazolopyrimidine |
US20060193912A1 (en) | 2005-02-28 | 2006-08-31 | Penwest Pharmaceuticals Co. | Controlled release O-desmethylvenlafaxine formulations |
AU2006275476A1 (en) | 2005-08-01 | 2007-02-08 | Alpharma Inc. | Alcohol resistant pharmaceutical formulations |
WO2007025005A2 (en) | 2005-08-24 | 2007-03-01 | Penwest Pharmaceuticals Co. | Sustained release formulations of nalbuphine |
PL116330U1 (en) | 2005-10-31 | 2007-04-02 | Alza Corp | Method for the reduction of alcohol provoked rapid increase in the released dose of the orally administered opioide with prolonged liberation |
US20070184115A1 (en) | 2005-12-30 | 2007-08-09 | Biovail Laboratories International S.R.L. | Modified release formulations of tramadol and uses thereof |
US20070212414A1 (en) | 2006-03-08 | 2007-09-13 | Penwest Pharmaceuticals Co. | Ethanol-resistant sustained release formulations |
US20080119501A1 (en) * | 2006-04-28 | 2008-05-22 | Hein William A | Immediate release oxymorphone compositions and methods of using same |
US20080085303A1 (en) * | 2006-10-10 | 2008-04-10 | Penwest Pharmaceuticals Co. | Robust sustained release formulations of oxymorphone and methods of use thereof |
CN101578096A (en) | 2006-10-10 | 2009-11-11 | 潘威斯脱药物公司 | Robust sustained release formulations |
JP2010505948A (en) | 2006-10-10 | 2010-02-25 | ペンウェスト ファーマシューティカルズ カンパニー | Robust sustained release formulation of oxymorphone and method of use thereof |
US20080085304A1 (en) * | 2006-10-10 | 2008-04-10 | Penwest Pharmaceuticals Co. | Robust sustained release formulations |
US20080085305A1 (en) * | 2006-10-10 | 2008-04-10 | Penwest Pharmaceuticals Co. | Robust sustained release formulations of oxymorphone |
BRPI0621952A2 (en) | 2006-10-10 | 2011-10-18 | Penwest Pharmaceutical Co | robust formulations with prolonged release of oxymorphone and methods of using them |
US20080318993A1 (en) | 2007-06-21 | 2008-12-25 | Endo Pharmaceuticals, Inc. | Method of Treating Pain Utilizing Controlled Release Oxymorphone Pharmaceutical Compositions and Instruction on Dosing for Hepatic Impairment |
US20080318994A1 (en) | 2007-06-21 | 2008-12-25 | Endo Pharmaceuticals, Inc. | Method of Treating Pain Utilizing Controlled Release Oxymorphone Pharmaceutical Compositions and Instruction on Dosing for Renal Impairment |
-
2002
- 2002-07-03 CN CNA028153243A patent/CN1610551A/en active Pending
- 2002-07-03 AU AU2002316582A patent/AU2002316582B2/en not_active Ceased
- 2002-07-03 US US10/190,192 patent/US9820982B2/en not_active Expired - Lifetime
- 2002-07-03 ES ES02746895T patent/ES2284888T3/en not_active Expired - Lifetime
- 2002-07-03 AT AT02746895T patent/ATE359077T1/en not_active IP Right Cessation
- 2002-07-03 JP JP2003510041A patent/JP4440635B2/en not_active Expired - Fee Related
- 2002-07-03 DE DE60219478T patent/DE60219478T2/en not_active Expired - Lifetime
- 2002-07-03 KR KR10-2003-7003330A patent/KR20030034171A/en active Search and Examination
- 2002-07-03 CN CNA028172361A patent/CN1551770A/en active Pending
- 2002-07-03 US US10/189,653 patent/US20040214849A1/en not_active Abandoned
- 2002-07-03 WO PCT/US2002/021398 patent/WO2003004031A1/en active IP Right Grant
- 2002-07-03 CN CNB02815276XA patent/CN1268338C/en not_active Expired - Fee Related
- 2002-07-03 WO PCT/US2002/021400 patent/WO2003004032A1/en active IP Right Grant
- 2002-07-03 WO PCT/US2002/021396 patent/WO2003004030A1/en active IP Right Grant
- 2002-07-03 JP JP2003510043A patent/JP2005515966A/en active Pending
- 2002-07-03 JP JP2003510042A patent/JP2005520778A/en active Pending
- 2002-07-03 US US10/189,897 patent/US20030130297A1/en not_active Abandoned
- 2002-07-03 EP EP02746895A patent/EP1414458B1/en not_active Expired - Lifetime
- 2002-07-03 BR BR0205721-2A patent/BR0205721A/en not_active Application Discontinuation
- 2002-07-03 CA CA002452874A patent/CA2452874A1/en not_active Abandoned
- 2002-07-03 EP EP02749821A patent/EP1404333A1/en not_active Ceased
- 2002-07-03 CA CA2452871A patent/CA2452871C/en not_active Expired - Fee Related
- 2002-07-03 AU AU2002320309A patent/AU2002320309B2/en not_active Ceased
- 2002-07-03 EP EP02748086A patent/EP1406630A1/en not_active Withdrawn
- 2002-07-03 AU AU2002318211A patent/AU2002318211B2/en not_active Ceased
- 2002-07-03 EP EP10162749A patent/EP2311460A1/en not_active Withdrawn
- 2002-07-03 CA CA002452872A patent/CA2452872A1/en not_active Abandoned
-
2003
- 2003-03-05 NO NO20031018A patent/NO20031018L/en not_active Application Discontinuation
-
2006
- 2006-06-22 US US11/425,966 patent/US20070098792A1/en not_active Abandoned
- 2006-06-23 US US11/426,170 patent/US20070098793A1/en not_active Abandoned
-
2007
- 2007-02-28 US US11/680,432 patent/US8309122B2/en active Active
-
2008
- 2008-07-03 US US12/167,859 patent/US20080262013A1/en not_active Abandoned
-
2009
- 2009-02-26 JP JP2009044920A patent/JP2009114209A/en active Pending
- 2009-04-17 US US12/426,112 patent/US20090192183A1/en not_active Abandoned
-
2013
- 2013-06-03 US US13/908,328 patent/US20140134250A1/en not_active Abandoned
-
2014
- 2014-09-22 US US14/492,701 patent/US20150011577A1/en not_active Abandoned
-
2015
- 2015-07-14 US US14/798,619 patent/US20160136152A1/en not_active Abandoned
-
2018
- 2018-07-30 US US16/049,390 patent/US20180338967A1/en not_active Abandoned
-
2020
- 2020-09-28 US US17/035,453 patent/US20210008063A1/en not_active Abandoned
Patent Citations (99)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US458349A (en) * | 1891-08-25 | Hose-coupling | ||
US591431A (en) * | 1897-10-12 | Coupling for traps and pipes | ||
US2806033A (en) * | 1955-08-03 | 1957-09-10 | Lewenstein | Morphine derivative |
US3400197A (en) * | 1965-01-26 | 1968-09-03 | Robins Co Inc A H | Compressible sustained release pharmaceutical tablet lipid-colloidal silica gel matrix fragment granules |
US3456049A (en) * | 1965-05-25 | 1969-07-15 | Ciba Geigy Corp | Gradual-release tablet |
US3393197A (en) * | 1966-01-19 | 1968-07-16 | Endo Lab | Nu-substituted-14-hydroxydihydronormorphines |
US3558768A (en) * | 1969-12-19 | 1971-01-26 | Sterling Drug Inc | Sustained release pharmaceutical compositions |
US3845770A (en) * | 1972-06-05 | 1974-11-05 | Alza Corp | Osmatic dispensing device for releasing beneficial agent |
US4140755A (en) * | 1976-02-13 | 1979-02-20 | Hoffmann-La Roche Inc. | Sustained release tablet formulations |
US4177782A (en) * | 1976-11-01 | 1979-12-11 | Hitachi, Ltd. | Ignition system providing sparks for two ignition plugs in each cylinder from a single ignition coil |
US4309405A (en) * | 1979-08-09 | 1982-01-05 | American Home Products Corporation | Sustained release pharmaceutical compositions |
US4248858A (en) * | 1979-08-09 | 1981-02-03 | American Home Products Corporation | Sustained release pharmaceutical compositions |
US4252786A (en) * | 1979-11-16 | 1981-02-24 | E. R. Squibb & Sons, Inc. | Controlled release tablet |
US4366159A (en) * | 1981-09-08 | 1982-12-28 | Michael Richard Magruder | Nalbuphine-narcotic analgesic composition and method of producing analgesia |
US4415547A (en) * | 1982-06-14 | 1983-11-15 | Sterling Drug Inc. | Sustained-release pharmaceutical tablet and process for preparation thereof |
US4777174A (en) * | 1982-07-22 | 1988-10-11 | Analgesic Associates | Analgesic and anti-inflammatory compositions comprising caffeine and methods of using same |
US4656177A (en) * | 1982-07-22 | 1987-04-07 | Analgesic Associates | Analgesic and anti-inflammatory compositions comprising caffeine and methods of using same |
US4521402A (en) * | 1983-01-03 | 1985-06-04 | Verex Laboratories, Inc. | Constant release rate solid oral dosage formulations of hydrazine |
US4522804A (en) * | 1983-01-03 | 1985-06-11 | Verex Laboratories, Inc. | Constant release rate solid oral dosage formulations of propranolol |
US4521401A (en) * | 1983-01-03 | 1985-06-04 | Verex Laboratories, Inc. | Constant release rate solid oral dosage formulations of quinidine |
US4461759A (en) * | 1983-01-03 | 1984-07-24 | Verex Laboratories, Inc. | Constant release rate solid oral dosage formulations of veropamil |
US4711782A (en) * | 1983-11-04 | 1987-12-08 | Takeda Chemical Industries, Ltd. | Prolonged release microcapsules and their production |
US4695467A (en) * | 1984-07-12 | 1987-09-22 | Fujisawa Pharmaceutical Co., Ltd. | Sustained release tablet |
US4610870A (en) * | 1984-10-05 | 1986-09-09 | E. R. Squibb & Sons, Inc. | Controlled release formulation |
US4661492A (en) * | 1984-11-30 | 1987-04-28 | Reckitt & Colman Products Limited | Analgesic compositions |
US4599114A (en) * | 1985-02-11 | 1986-07-08 | Atkinson George K | Treatment of titanium dioxide and other pigments to improve dispersibility |
US4940587A (en) * | 1985-06-11 | 1990-07-10 | Euroceltique, S.A. | Oral pharmaceutical composition through mucosa |
US4844907A (en) * | 1985-08-28 | 1989-07-04 | Euroceltique, S.A. | Pharmaceutical composition comprising analgesic and anti-inflammatory agent |
US5415871A (en) * | 1986-01-18 | 1995-05-16 | The Boots Company Plc | Therapeutic agents |
US4973469A (en) * | 1986-02-03 | 1990-11-27 | Elan Corporation, Plc | Drug delivery system |
US5047248A (en) * | 1986-03-07 | 1991-09-10 | Eurand Italia S.P.A. | Formulation for preparing sustained release drugs for oral administration |
US4803081A (en) * | 1986-04-11 | 1989-02-07 | Aktiebolaget Hassle | New pharmaceutical preparations with extended release |
US4861598A (en) * | 1986-07-18 | 1989-08-29 | Euroceltique, S.A. | Controlled release bases for pharmaceuticals |
US4844909A (en) * | 1986-10-31 | 1989-07-04 | Euroceltique, S.A. | Controlled release hydromorphone composition |
US4968508A (en) * | 1987-02-27 | 1990-11-06 | Eli Lilly And Company | Sustained release matrix |
US4867985A (en) * | 1987-03-04 | 1989-09-19 | Euroceltique S.A. | Spheroids |
US5132116A (en) * | 1987-07-16 | 1992-07-21 | Pierre Fabre Medicament | Tablets of the hydrophilic matrix type based on salbutamol and a process for their preparation |
US4792452A (en) * | 1987-07-28 | 1988-12-20 | E. R. Squibb & Sons, Inc. | Controlled release formulation |
US4942040A (en) * | 1987-10-08 | 1990-07-17 | Aktiebolaget Hassle | Pharmaceutical preparation and a process for its preparation |
US5051263A (en) * | 1987-10-12 | 1991-09-24 | Barry Brian W | Controlled-release formulations |
US4935428A (en) * | 1987-12-03 | 1990-06-19 | Reckitt & Colman Products Limited | Treating opiate dependence |
US5096714A (en) * | 1988-06-28 | 1992-03-17 | Hauser-Kuhrts, Inc. | Prolonged release drug tablet formulations |
US4980170A (en) * | 1988-06-30 | 1990-12-25 | Klinge Pharma Gmbh | Pharmaceutical formulation as well as a process for its preparation |
US5004614A (en) * | 1988-08-26 | 1991-04-02 | Forum Chemicals Ltd. | Controlled release device with an impermeable coating having an orifice for release of drug |
US5135757A (en) * | 1988-09-19 | 1992-08-04 | Edward Mendell Co., Inc. | Compressible sustained release solid dosage forms |
US5128143A (en) * | 1988-09-19 | 1992-07-07 | Edward Mendell Co., Inc. | Sustained release excipient and tablet formulation |
US4994276A (en) * | 1988-09-19 | 1991-02-19 | Edward Mendell Co., Inc. | Directly compressible sustained release excipient |
US5236714A (en) * | 1988-11-01 | 1993-08-17 | Alza Corporation | Abusable substance dosage form having reduced abuse potential |
US5202128A (en) * | 1989-01-06 | 1993-04-13 | F. H. Faulding & Co. Limited | Sustained release pharmaceutical composition |
US5145683A (en) * | 1989-02-14 | 1992-09-08 | Ethical Pharmaceuticals, Ltd. | Nifedipine-containing pharmaceutical compositions and process for the preparation thereof |
US5126145A (en) * | 1989-04-13 | 1992-06-30 | Upsher Smith Laboratories Inc | Controlled release tablet containing water soluble medicament |
US5100675A (en) * | 1989-05-03 | 1992-03-31 | Schering Corporation | Sustained release tablet comprising loratadine, ibuprofen and pseudoephedrine |
US5126147A (en) * | 1990-02-08 | 1992-06-30 | Biosearch, Inc. | Sustained release dosage form |
US5164193A (en) * | 1990-07-25 | 1992-11-17 | Ss Pharmaceutical Co., Ltd. | Sustained-release tablet |
US5431922A (en) * | 1991-03-05 | 1995-07-11 | Bristol-Myers Squibb Company | Method for administration of buspirone |
US5470584A (en) * | 1991-05-20 | 1995-11-28 | Carderm Capital L.P. | Diltiazem formulation |
US5169638A (en) * | 1991-10-23 | 1992-12-08 | E. R. Squibb & Sons, Inc. | Buoyant controlled release powder formulation |
US20010008639A1 (en) * | 1991-11-27 | 2001-07-19 | Benjamin Oshlack | Controlled release oxycodone compositions |
US5266331A (en) * | 1991-11-27 | 1993-11-30 | Euroceltique, S.A. | Controlled release oxycodone compositions |
US6294195B1 (en) * | 1991-12-24 | 2001-09-25 | Purdue Pharma L.P. | Orally administrable opioid formulations having extended duration of effect |
US6316031B1 (en) * | 1991-12-24 | 2001-11-13 | Purdue Pharma Lp | Stabilized controlled release substrate having a coating derived from an aqueous dispersion of hydrophobic polymer |
US5639476A (en) * | 1992-01-27 | 1997-06-17 | Euro-Celtique, S.A. | Controlled release formulations coated with aqueous dispersions of acrylic polymers |
US5629011A (en) * | 1992-02-05 | 1997-05-13 | Danbiosyst Uk Limited | Composition for nasal administration |
US5512578A (en) * | 1992-09-21 | 1996-04-30 | Albert Einstein College Of Medicine Of Yeshiva University, A Division Of Yeshiva University | Method of simultaneously enhancing analgesic potency and attenuating dependence liability caused by exogenous and endogenous opiod agonists |
US5330761A (en) * | 1993-01-29 | 1994-07-19 | Edward Mendell Co. Inc. | Bioadhesive tablet for non-systemic use products |
US6143322A (en) * | 1993-07-01 | 2000-11-07 | Purdue Pharma L.P. | Method of treating humans with opioid formulations having extended controlled release |
US6103261A (en) * | 1993-07-01 | 2000-08-15 | Purdue Pharma Lp | Opioid formulations having extended controlled release |
US5455046A (en) * | 1993-09-09 | 1995-10-03 | Edward Mendell Co., Inc. | Sustained release heterodisperse hydrogel systems for insoluble drugs |
US5554387A (en) * | 1993-09-09 | 1996-09-10 | Edward Mendell Co., Ltd. | Sustained release heterodisperse hydrogel systems for insoluble drugs |
US5958456A (en) * | 1993-09-09 | 1999-09-28 | Edward Mendell Co., Inc. | Controlled release formulation (albuterol) |
US5512297A (en) * | 1993-09-09 | 1996-04-30 | Edward Mendell Co., Inc. | Sustained release heterodisperse hydrogel systems for insoluble drugs |
US5662933A (en) * | 1993-09-09 | 1997-09-02 | Edward Mendell Co., Inc. | Controlled release formulation (albuterol) |
US5399358A (en) * | 1993-11-12 | 1995-03-21 | Edward Mendell Co., Inc. | Sustained release formulations for 24 hour release of metroprolol |
US5672360A (en) * | 1993-11-23 | 1997-09-30 | Purdue Pharma, L.P. | Method of treating pain by administering 24 hour oral opioid formulations |
US6309668B1 (en) * | 1994-02-01 | 2001-10-30 | Aventis Pharma Limited | Abuse resistant tablets |
US5399359A (en) * | 1994-03-04 | 1995-03-21 | Edward Mendell Co., Inc. | Controlled release oxybutynin formulations |
US5399362A (en) * | 1994-04-25 | 1995-03-21 | Edward Mendell Co., Inc. | Once-a-day metoprolol oral dosage form |
US5958458A (en) * | 1994-06-15 | 1999-09-28 | Dumex-Alpharma A/S | Pharmaceutical multiple unit particulate formulation in the form of coated cores |
US5633000A (en) * | 1994-06-23 | 1997-05-27 | Axxia Technologies | Subcutaneous implant |
US5858388A (en) * | 1994-06-23 | 1999-01-12 | Axxia Technologies | Subcutaneous implant for delivery of hydromorphone |
US5965161A (en) * | 1994-11-04 | 1999-10-12 | Euro-Celtique, S.A. | Extruded multi-particulates |
US5948438A (en) * | 1995-01-09 | 1999-09-07 | Edward Mendell Co., Inc. | Pharmaceutical formulations having improved disintegration and/or absorptivity |
US5612053A (en) * | 1995-04-07 | 1997-03-18 | Edward Mendell Co., Inc. | Controlled release insufflation carrier for medicaments |
US6387394B1 (en) * | 1995-04-07 | 2002-05-14 | Penwest Pharmaceuticals Co. | Controlled release insufflation carrier for medicaments |
US5738865A (en) * | 1995-04-07 | 1998-04-14 | Edward Mendell Co., Inc. | Controlled release insufflation carrier for medicaments |
US5567754A (en) * | 1995-08-23 | 1996-10-22 | Kerr-Mcgee Corporation | Pigments with improved dispersibility in thermoplastic resins |
US6245351B1 (en) * | 1996-03-07 | 2001-06-12 | Takeda Chemical Industries, Ltd. | Controlled-release composition |
US6093420A (en) * | 1996-07-08 | 2000-07-25 | Edward Mendell Co., Inc. | Sustained release matrix for high-dose insoluble drugs |
US6248789B1 (en) * | 1996-08-29 | 2001-06-19 | Stuart L. Weg | Administration of ketamine to manage pain and to reduce drug dependency |
US5891474A (en) * | 1997-01-29 | 1999-04-06 | Poli Industria Chimica, S.P.A. | Time-specific controlled release dosage formulations and method of preparing same |
US6340475B2 (en) * | 1997-06-06 | 2002-01-22 | Depomed, Inc. | Extending the duration of drug release within the stomach during the fed mode |
US6102358A (en) * | 1997-11-03 | 2000-08-15 | Mcleary; Joseph Butler | Counterpoise and mounting clamp for a musical drum |
US6413494B1 (en) * | 1998-07-23 | 2002-07-02 | Samyang Corporation | Composition and pharmaceutical dosage form for colonic drug delivery using polysaccharides |
US6228398B1 (en) * | 1998-11-02 | 2001-05-08 | Elan Corporation, Plc | Multiparticulate modified release composition |
US20020044966A1 (en) * | 1999-01-18 | 2002-04-18 | Johannes Bartholomaeus | Pharmaceutical formulations containing an opioid and an alpha-agonist |
US6306425B1 (en) * | 1999-04-09 | 2001-10-23 | Southern Research Institute | Injectable naltrexone microsphere compositions and their use in reducing consumption of heroin and alcohol |
US6296842B1 (en) * | 2000-08-10 | 2001-10-02 | Alkermes Controlled Therapeutics, Inc. | Process for the preparation of polymer-based sustained release compositions |
US20030044458A1 (en) * | 2001-08-06 | 2003-03-06 | Curtis Wright | Oral dosage form comprising a therapeutic agent and an adverse-effect agent |
US20030091635A1 (en) * | 2001-09-26 | 2003-05-15 | Baichwal Anand R. | Opioid formulations having reduced potential for abuse |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009060332A1 (en) * | 2009-12-23 | 2011-06-30 | Telefónica O2 Germany GmbH & Co. OHG, 80992 | Method and device for providing a telecommunication service |
US9730885B2 (en) | 2012-07-12 | 2017-08-15 | Mallinckrodt Llc | Extended release, abuse deterrent pharmaceutical compositions |
US10485753B2 (en) | 2012-07-12 | 2019-11-26 | SpecGx LLC | Extended release, abuse deterrent pharmaceutical compositions |
US11096887B2 (en) | 2012-07-12 | 2021-08-24 | SpecGx LLC | Extended release, abuse deterrent pharmaceutical compositions |
Also Published As
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20210008063A1 (en) | Oxymorphone controlled release compositions | |
US8329216B2 (en) | Oxymorphone controlled release formulations | |
AU2002320309A1 (en) | Oxymorphone controlled release formulations | |
US7276250B2 (en) | Sustained release formulations of oxymorphone | |
US20220313688A1 (en) | Method of treating pain utilizing controlled release oxymorphone pharmaceutical compositions and instruction on dosing for renal impairment | |
EP2402005B1 (en) | Sustained release formulations of nalbuphine | |
IL112637A (en) | Pharmaceutical composition containing oxybutynin and methods for the preparation thereof | |
HU227514B1 (en) | Controlled release oxycodone compositions | |
US20090124650A1 (en) | Method of Treating Pain Utilizing Controlled Release Oxymorphone Pharmaceutical Compositions and Instructions on Effects of Alcohol | |
WO1996012477A1 (en) | Controlled release oral delivery system containing oxybutynin | |
US20080318993A1 (en) | Method of Treating Pain Utilizing Controlled Release Oxymorphone Pharmaceutical Compositions and Instruction on Dosing for Hepatic Impairment | |
ZA200301807B (en) | Oxymorphone controlled release formulations. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT Free format text: SECURITY AGREEMENT;ASSIGNOR:ENDO PHARMACEUTICALS INC.;REEL/FRAME:023390/0120 Effective date: 20091016 |
|
AS | Assignment |
Owner name: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT Free format text: SECURITY AGREEMENT;ASSIGNOR:ENDO PHARMACEUTICALS INC.;REEL/FRAME:025416/0381 Effective date: 20101130 |
|
AS | Assignment |
Owner name: ENDO PHARMACEUTICALS INC., PENNSYLVANIA Free format text: RELEASE OF PATENT SECURITY INTEREST RECORDED AT REEL/FRAME 23390/120;ASSIGNOR:JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:025441/0305 Effective date: 20101130 |
|
AS | Assignment |
Owner name: MORGAN STANLEY SENIOR FUNDING, INC., AS ADMINISTRA Free format text: SECURITY AGREEMENT;ASSIGNOR:ENDO PHARMACEUTICALS INC.;REEL/FRAME:026557/0350 Effective date: 20110617 |
|
AS | Assignment |
Owner name: ENDO PHARMACEUTICALS INC., PENNSYLVANIA Free format text: RELEASE OF SECURITY INTEREST RECORDED AT REEL/FRAME 25416/381;ASSIGNOR:JPMORGAN CHASE BANK N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:026572/0148 Effective date: 20110617 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |
|
AS | Assignment |
Owner name: ENDO PHARMACEUTICALS INC., PENNSYLVANIA Free format text: RELEASE OF PATENT SECURITY INTEREST;ASSIGNOR:MORGAN STANLEY SENIOR FUNDING, INC., AS ADMINISTRATIVE AGENT;REEL/FRAME:032380/0198 Effective date: 20140228 |